I'm not looking for reduced loads. I want to see if a little faster burning powder would increase the velocity lost from a radically shorter barrel...
This
No it will not
Blu Cs;
Good evening to you sir and hopefully it's still early enough that I'm able to get away with a Happy New Year as well.
As has been already posted, that hasn't been our experience - that is we'll load whatever powder gives peak performance in that cartridge and bullet combination and not pay too, too much attention to burn rate.
Perhaps a few quick examples are okay and I'll start with a 788 carbine in .308 which has an 18½" barrel. With bullet weight from 125gr to 165gr powders in the WW748, IMR 4064 burn rate gave better results for accuracy and velocity than say IMR3031.
In a 21" .30-06, again the best results for accuracy and speed with either WW760 or IMR4350 - better for sure than IMR3031, 4064 or H4895.
Lastly in a 20" 6.5x55 and a 21" 6.5x55, we've seen best results with RL19, VV560, IMR or H4831 have yielded best results.
Hopefully that was useful for you or someone out there tonight. All the very best to all in 2021.
Dwayne
