Barnes BCs...
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Anonymous
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At what velocity? That's the rub-- and one of the reasons static BC's do not work.
Compared to:
250 Barnes Expander .147 BC
270 gr. Speer Gold Dot .167 BC
Winchester 260 gr. mv=1832 BC .183
250 SST .184 BC MV 1928 fps 100 yd. 1574
215 QT .174 BC MV 1890 fps
DC 220 100 gr. 1801 fps .192 BC
200 gr. XTP 70 gr. T 7 FFFg 1702 fps BC .183
240 XTP (.429) 1635 fps BC .193
240 gr. Harvester Rainier 1642 fps BC .189
DC 200 1690 fps BC .179
The Barnes Semi-Spitzer wins-- most importantly, at a higher muzzle velocity. :shock:
Compared to:
250 Barnes Expander .147 BC
270 gr. Speer Gold Dot .167 BC
Winchester 260 gr. mv=1832 BC .183
250 SST .184 BC MV 1928 fps 100 yd. 1574
215 QT .174 BC MV 1890 fps
DC 220 100 gr. 1801 fps .192 BC
200 gr. XTP 70 gr. T 7 FFFg 1702 fps BC .183
240 XTP (.429) 1635 fps BC .193
240 gr. Harvester Rainier 1642 fps BC .189
DC 200 1690 fps BC .179
The Barnes Semi-Spitzer wins-- most importantly, at a higher muzzle velocity. :shock:
A
Anonymous
Guest
And the "Savage BC" of a 300 gr. SST-------------- .187.
Maybe we need "Savage BC's." :?
Maybe we need "Savage BC's." :?
A
Anonymous
Guest
Sierra .458 300gr. .204 SD
.120 @ 2400 fps and above
.145 between 2400 and 1900 fps
.185 between 1900 and 1400 fps
.210 between 1400 and 1150 fps
Do people REALLY want accurate BC's? :?
I can't say that they do. The above Sierra published BC's is an example of as accurate as can be had today. A BC number means absolutely nothing unless matched to a velocity, nothing at all.
So, there it is-- with several Savage loads, you have an operating BC of .145. If you get that bullet out of the gate with 44 gr. 5744, that equates to about 2050 fps-- and the .185 BC is very, very, very close what you can expect as a 100 yard screen to screen average.
Even though the .185 is a FAR more valuable and workable value, that gives the shooter a very good representation of what he has to work with in the field, few appreciate that. The assumption is made that the Hornady 300 gr. SST with a stated .25 BC is a far better flier-- but, it isn't.
Anyone can load at the BC's supplied with PR Bullets Dead Center bullets-- their .45 / 50 300 gr. bullet has a stated BC of .336 with a muzzle velocity stated as 1880 fps. Do you think it flies better than a .25 BC
300 gr. SST?
It actually flies worse. :shock:
It is another reason why high velocity .45 caliber loads make very little sense-- the recoil coefficient is higher, so we might think that we are actually doing something extremely meaningful downrange just because our shoulder says so.
But, we aren't. Shoulder ballistics don't work well at all. Beat yourself up all you want, and you just MIGHT get that 10 - 15 yards of extra MPBR. How smart is that, really? :?: The faster you go, the more the air fights back. Much more than 2300 fps with a .45 caliber bullet is a waste of time, it gets you so very little of value at 200 yards that you might wonder what all the fuss is about.
.120 @ 2400 fps and above
.145 between 2400 and 1900 fps
.185 between 1900 and 1400 fps
.210 between 1400 and 1150 fps
Do people REALLY want accurate BC's? :?
I can't say that they do. The above Sierra published BC's is an example of as accurate as can be had today. A BC number means absolutely nothing unless matched to a velocity, nothing at all.
So, there it is-- with several Savage loads, you have an operating BC of .145. If you get that bullet out of the gate with 44 gr. 5744, that equates to about 2050 fps-- and the .185 BC is very, very, very close what you can expect as a 100 yard screen to screen average.
Even though the .185 is a FAR more valuable and workable value, that gives the shooter a very good representation of what he has to work with in the field, few appreciate that. The assumption is made that the Hornady 300 gr. SST with a stated .25 BC is a far better flier-- but, it isn't.
Anyone can load at the BC's supplied with PR Bullets Dead Center bullets-- their .45 / 50 300 gr. bullet has a stated BC of .336 with a muzzle velocity stated as 1880 fps. Do you think it flies better than a .25 BC
300 gr. SST?
It actually flies worse. :shock:
It is another reason why high velocity .45 caliber loads make very little sense-- the recoil coefficient is higher, so we might think that we are actually doing something extremely meaningful downrange just because our shoulder says so.
But, we aren't. Shoulder ballistics don't work well at all. Beat yourself up all you want, and you just MIGHT get that 10 - 15 yards of extra MPBR. How smart is that, really? :?: The faster you go, the more the air fights back. Much more than 2300 fps with a .45 caliber bullet is a waste of time, it gets you so very little of value at 200 yards that you might wonder what all the fuss is about.
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