COL Question

[George Foster]

I would like to ask if say I am using Sierra 243 bullets in either a 243 or 6mm would bullets of different weights with the same ogives would give the best accuracy with the same COL? If I am shooting a 6mm and using a 2.860COL (Best accuracy) for the 75HP would a 80SPBT and a 85HPBT (They all have the same ogives) give the best accuracy after you found the best powder charge for each bullet give the best accuracy with a 2.860COL also?

 

[bdbrown66]

Based on my experience, the answer is "not necessarily." It's probably a good place to start, but every change in bullet/powder/case/primer has it's own quirks, that may or may not agree with your rifle.

 

[SJB358]

I’d probably say no. It might be close but I doubt if it’d be the best.

 

[DrMike]

The advice you received is spot on. Differences in metallurgy, bearing surface, etc. all contribute to the load characteristics.