nksmfamjp
Well-Known Member
- Joined
- Jan 5, 2004
- Messages
- 3,438
If I get the Hornady theory of group building, it sounds like shoot larger sample sizes to more precisely determine the accuracy of the load in the barrel.
So, you need to shoot something to find pressure, right. So you have to shoot ~30 to determine this, especially shooting non-std cartridges, oal's and jump distances.
Then you would shoot 20-50 round groups to set powder charge for the bullet. Then seating depth. Then primer type, Then neck tension, then crimp, then primer depth, then repeat for several bullets to get match level results.
Doing all this for several bullets and what are we talking 1000 rounds of barrel life? How much is left for match shooting. Does this mean I can develop on one barrel and apply results to the next 2-3 barrels? Maybe.
The other side develops off 3-5 round groups, gets to a load in under 300 rounds, but struggles with things like load tune at long range, load tune range to range, other issues. The one thing this group doesn't do is chase results and then running out of barrel life.
How do you combine the 2 to get a "best value"?
So, you need to shoot something to find pressure, right. So you have to shoot ~30 to determine this, especially shooting non-std cartridges, oal's and jump distances.
Then you would shoot 20-50 round groups to set powder charge for the bullet. Then seating depth. Then primer type, Then neck tension, then crimp, then primer depth, then repeat for several bullets to get match level results.
Doing all this for several bullets and what are we talking 1000 rounds of barrel life? How much is left for match shooting. Does this mean I can develop on one barrel and apply results to the next 2-3 barrels? Maybe.
The other side develops off 3-5 round groups, gets to a load in under 300 rounds, but struggles with things like load tune at long range, load tune range to range, other issues. The one thing this group doesn't do is chase results and then running out of barrel life.
How do you combine the 2 to get a "best value"?