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I ordered my conversion breech plug on 2/24/10 and received it in the mail today. 
Lehigh Knight NFPJ conversion is now for sale.
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Mine arrived today too
Quality comparison vs knight
Just received my Lehigh breechplug this morning. I compared the Lehigh to the Knight and can honestly say that the Lehigh breechplug is a quantum leap in quality compared to the knight. I believe the machine work is first class. The alloy steel Dave used in the manufacture of his breechplug is perfect for the application. Thank you Dave !!!
Just received my Lehigh breechplug this morning. I compared the Lehigh to the Knight and can honestly say that the Lehigh breechplug is a quantum leap in quality compared to the knight. I believe the machine work is first class. The alloy steel Dave used in the manufacture of his breechplug is perfect for the application. Thank you Dave !!!
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Ok, received my in the mail today. Curious how everyone elses fit?
I have a Knight LRH which should have the same bolt set up as the extreme. However, the piece that fits on the end of the bolt (original Piece) slips on without effort.
When I went to slide the new piece in, it wedged about 1/2 way in. I had to use a small wooden mallet to get it to seat all the way into the bolt. Anyone know if that is how it is supposed to fit?
It will be a pretty major thing to remove it for cleaning as well.
Curious how yours fit.
I have a Knight LRH which should have the same bolt set up as the extreme. However, the piece that fits on the end of the bolt (original Piece) slips on without effort.
When I went to slide the new piece in, it wedged about 1/2 way in. I had to use a small wooden mallet to get it to seat all the way into the bolt. Anyone know if that is how it is supposed to fit?
It will be a pretty major thing to remove it for cleaning as well.
Curious how yours fit.
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I HAVE BEEN ON A TDY BUT I SAW THIS WHEN I GOT BACK, THOUGHT I WOULD HAVE ONE SHIPPED ALREADY.
David,
Thank you for your order of the Breech Plug Kit. Due to problems some customers are experiencing with the interface of the kits to their particular Knight rifles, we have refunded your money by crediting your credit card. Your order has not shipped.
Our goal on redesigning the breech plug and primer holder was to significantly reduce blowback, provide instantaneous ignition with Blackhorn 209 while utilizing an inexpensive vent liner that could be replaced when worn.
Once we began studying the Knight design, it was apparent that factory assembly fits were much looser than would seem reasonable. After many trials we had a functioning plug that exceeded the design goals when used on three different rifles. When redesigning the assembly, we tightened up tolerances on the components. There was risk in this as the reason for the loose fit on the factory parts could be attributable to being necessary to encompass the manufacturing variation on the gun and components produced by Knight. Recognizing this risk, we expanded the testing to six shooters and over ten guns.
Now, in a very brief time, we realize that our sample size of guns, primer lots, and installation wrenches was not sufficient to uncover the factory manufacturing variation that exists. At this time, we are suspending sales of the kits until the variation is better understood.
The changes to the Lehigh design to encompass the variation of the factory guns will in no way effect the improvements made to blowback reduction and instantaneous ignition.
I sincerely apologize for this inconvenience. Once the changes have been made and thoroughly tested, they will be able to be purchased off the website.
Thank you for your understanding.
David,
Thank you for your order of the Breech Plug Kit. Due to problems some customers are experiencing with the interface of the kits to their particular Knight rifles, we have refunded your money by crediting your credit card. Your order has not shipped.
Our goal on redesigning the breech plug and primer holder was to significantly reduce blowback, provide instantaneous ignition with Blackhorn 209 while utilizing an inexpensive vent liner that could be replaced when worn.
Once we began studying the Knight design, it was apparent that factory assembly fits were much looser than would seem reasonable. After many trials we had a functioning plug that exceeded the design goals when used on three different rifles. When redesigning the assembly, we tightened up tolerances on the components. There was risk in this as the reason for the loose fit on the factory parts could be attributable to being necessary to encompass the manufacturing variation on the gun and components produced by Knight. Recognizing this risk, we expanded the testing to six shooters and over ten guns.
Now, in a very brief time, we realize that our sample size of guns, primer lots, and installation wrenches was not sufficient to uncover the factory manufacturing variation that exists. At this time, we are suspending sales of the kits until the variation is better understood.
The changes to the Lehigh design to encompass the variation of the factory guns will in no way effect the improvements made to blowback reduction and instantaneous ignition.
I sincerely apologize for this inconvenience. Once the changes have been made and thoroughly tested, they will be able to be purchased off the website.
Thank you for your understanding.
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I have sent mine back to them with my Knight LRH bolt so they can see firsthand the problem I am having. I am sure they will get it figured out post haste. Hope so, I want to use mine in Colorado next fall.
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A little old but whatever happened with this new BP design?? I am thinking of going without the plastic jacket on one of my Knights & thought this may be the deal. I usually use the orange jackets & also have 2 guns that take the red. The site says they will be in stock on 19 April. Any advice for a guy who is ready to go with a non plastic jacket BP & B209???
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I would wait and see how well the Gen II works first. Anyone that got a Lehigh Gen I is supposed to get a Gen II. So reports will start coming in fairly soon.
Sabotloaders testing of the Gen II prototype looks very promising and MUCH cleaner since it head spaces the primer differently than the Gen I. I recently polished the primer pocket on my Gen I and just firing the primers its showing an improvement in the Extreme but the Elite 45 is still too dirty IMO. The tolerance is just too loose. The primer isnt going deep enough into the pocket. I even tried some Teflon tape on the primer for a better seal.
Im working on a cheap and easy way to add a tiny bit of length to a 209 primer and will start a new thread when im done with the experiment.
Mine works fine in the GMB54 but not very well in the Elite 45. The Extreme 50 is somewhere in between. The 45 though had awesome ignition and made 100gr charges feel like 110gr charges. Even the sabot powder cups looked like i was getting much better ignition.
His quality is really outstanding, it just needed a few more rifles to get the bugs worked out due to variations in the tolerances of various Disc rifles.
The FPJs will always be easier to load and likely prefered for hunting. Ive used both in 3 different Knights. Using FPJs and Bh209 i strongly recommend mag primers. FPJs dont seal as well when fired. Using the NFPJ i did not have a single hang fire. Using the FPJs ive had 2 but will soon be modding a FPJ plug with a Lehigh or PR vent liner installed as close to flush as possible.
Have a good one and be patient, i seriously think it will be worth the wait.
Scott
Sabotloaders testing of the Gen II prototype looks very promising and MUCH cleaner since it head spaces the primer differently than the Gen I. I recently polished the primer pocket on my Gen I and just firing the primers its showing an improvement in the Extreme but the Elite 45 is still too dirty IMO. The tolerance is just too loose. The primer isnt going deep enough into the pocket. I even tried some Teflon tape on the primer for a better seal.
Im working on a cheap and easy way to add a tiny bit of length to a 209 primer and will start a new thread when im done with the experiment.
Mine works fine in the GMB54 but not very well in the Elite 45. The Extreme 50 is somewhere in between. The 45 though had awesome ignition and made 100gr charges feel like 110gr charges. Even the sabot powder cups looked like i was getting much better ignition.
His quality is really outstanding, it just needed a few more rifles to get the bugs worked out due to variations in the tolerances of various Disc rifles.
The FPJs will always be easier to load and likely prefered for hunting. Ive used both in 3 different Knights. Using FPJs and Bh209 i strongly recommend mag primers. FPJs dont seal as well when fired. Using the NFPJ i did not have a single hang fire. Using the FPJs ive had 2 but will soon be modding a FPJ plug with a Lehigh or PR vent liner installed as close to flush as possible.
Have a good one and be patient, i seriously think it will be worth the wait.
Scott
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Thanks for the update. I will be standing by to get one or 2 to try out.
A
Anonymous
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I have Knights NFPJ conversion in my GM54 and I have no complaints with it. You just need to use Federal 209A primers. I have shot roughly 80 shots through mine with zero hang/misfires. Plus if Knight still has them they were marked down to around 27.00 with 10% off.
gm54-120: Can you explain what you mean by "awesome" ignition in the .45 elite ? Do you think the ignition plays a big part with accuracy with BH209 ?
Reason I ask is that I shot only Rem STS primers last year with BH209 with no ignition problems... mostly because they were noticeably cleaner than Fed 209A's using the NFPJ. I recently went back and reviewed some old targets and found I was getting better groups using the Federals. That has me thinking..maybe BH209 needs the hotter primer for not only for reliable ignition... but greater accuracy as well ?
Thanks... Rob
Reason I ask is that I shot only Rem STS primers last year with BH209 with no ignition problems... mostly because they were noticeably cleaner than Fed 209A's using the NFPJ. I recently went back and reviewed some old targets and found I was getting better groups using the Federals. That has me thinking..maybe BH209 needs the hotter primer for not only for reliable ignition... but greater accuracy as well ?
Thanks... Rob
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rt_con
I mean when i look at a powder cup on a sabot i can tell how hard it is being stressed. Normally 100gr of BH209 in a standard breach plug the powder cup looks fine. Using the Lehigh NFPJ the cup looks stressed with 100gr BH209 and the same primer, sabot and bullet.
The Lehigh NFPJ has a .500 ID recess to accommodate the Lehigh vent liner. I felt it was too big and may cause some erosion where the rifling begins. This larger vent liner "pocket" acts like a bottle neck cartridge does and appears to create better ignition.
The powder cups on the MMP tan sabots looked like the ones i fired using 110gr in a OEM breach plug. So something is happening. Ive even tried to test it during similar temps and barrel cool down time. Pressures appear to be higher and a progressive powder likes this condition.
To make a better comparison i would need a Knight NFPJ and add a vent liner in a smaller and shallower pocket. I have a modded FPJ plug on the way with a Lehigh liner. So it will have to do for now.
The odd part is i dont see this difference in the Extreme 50cal or GMB54. They all look pretty good/similar until i hit about 120gr depending on bullet weight.
BTW i dont care for mag primers unless i must use them. Ive had great luck with Win209s and BH209 in a good breach plug and they are much cleaner than the mags.
Scott
I mean when i look at a powder cup on a sabot i can tell how hard it is being stressed. Normally 100gr of BH209 in a standard breach plug the powder cup looks fine. Using the Lehigh NFPJ the cup looks stressed with 100gr BH209 and the same primer, sabot and bullet.
The Lehigh NFPJ has a .500 ID recess to accommodate the Lehigh vent liner. I felt it was too big and may cause some erosion where the rifling begins. This larger vent liner "pocket" acts like a bottle neck cartridge does and appears to create better ignition.
The powder cups on the MMP tan sabots looked like the ones i fired using 110gr in a OEM breach plug. So something is happening. Ive even tried to test it during similar temps and barrel cool down time. Pressures appear to be higher and a progressive powder likes this condition.
To make a better comparison i would need a Knight NFPJ and add a vent liner in a smaller and shallower pocket. I have a modded FPJ plug on the way with a Lehigh liner. So it will have to do for now.
The odd part is i dont see this difference in the Extreme 50cal or GMB54. They all look pretty good/similar until i hit about 120gr depending on bullet weight.
BTW i dont care for mag primers unless i must use them. Ive had great luck with Win209s and BH209 in a good breach plug and they are much cleaner than the mags.
Scott
The 45 cal gun creates higher pressure when fired with the same charge fired from a 50 cal gun which creates more pressure than the same charge fired from a 54 cal gun. It has to do with the volume in the barrel that the expanding gasses have to fill. My 45 cal guns are much harder on sabots than my buddies 50 cal with the same powder charges under the same bullet.
DC
DC
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minst7877
What i saying is ive tried it in all 3 calibers. you are right, the 45 sabots take more of a beating and so on with the 50 and 54. Although ive blown more 54 purples than any 50.
The ID of the breach plug vent liner pocket is larger than the bore in a 45 only. Its roughly equal or smaller in the 50 and 54 so it doesnt have the same effect.
The lowest point of combustion is larger than the bore in a 45 so it has more surface area with the Lehigh NFPJ Gen I....thats the easiest way to look at it anyway. I might have to get a Knight NFPJ conversion and mod the plug to make a better comparison.
What i saying is ive tried it in all 3 calibers. you are right, the 45 sabots take more of a beating and so on with the 50 and 54. Although ive blown more 54 purples than any 50.
The ID of the breach plug vent liner pocket is larger than the bore in a 45 only. Its roughly equal or smaller in the 50 and 54 so it doesnt have the same effect.
The lowest point of combustion is larger than the bore in a 45 so it has more surface area with the Lehigh NFPJ Gen I....thats the easiest way to look at it anyway. I might have to get a Knight NFPJ conversion and mod the plug to make a better comparison.
