- Joined
- Jul 26, 2014
- Messages
- 2,840
- Reaction score
- 1,388
In a previous post, Dead Center BC - it seems they are Way off the mark.
I also found an article that Hornady SST BC were mentioned to be off - I could not help but wonder?
Looking at BH209 data, I noticed both 250 & 300 SST were tested - I can only assume BH209 MV is correct.
Thinking one way someone could test the BC of a bullet to compare to the manufacture listed BC is to actually test with a Chrongraph (MV) at different distances and see where the bullets impact. i.e. if your elevation is 0 at 100, drop x" at 200, drop xx" at 300, etc..
So, using Hornady's Ballistic Calculator I put in both Hornady's BC and BH209 MV to create the result.
250gr SST, BC-0.21, MV-2119
BC-0.184, then only changing MV until the drop = actual Hornady results (very close).
The difference in Chronograph measurement could be as little as 3% (70fps) to change the BC 14%.
I also found an article that Hornady SST BC were mentioned to be off - I could not help but wonder?
Looking at BH209 data, I noticed both 250 & 300 SST were tested - I can only assume BH209 MV is correct.
Thinking one way someone could test the BC of a bullet to compare to the manufacture listed BC is to actually test with a Chrongraph (MV) at different distances and see where the bullets impact. i.e. if your elevation is 0 at 100, drop x" at 200, drop xx" at 300, etc..
So, using Hornady's Ballistic Calculator I put in both Hornady's BC and BH209 MV to create the result.
250gr SST, BC-0.21, MV-2119
BC-0.184, then only changing MV until the drop = actual Hornady results (very close).
The difference in Chronograph measurement could be as little as 3% (70fps) to change the BC 14%.