105gr berger VLD

[backwoods83]

Loner hit that dead on, a 4 groove krieger or brux will be harder on them than a conventional 6 grove, yet a 5R or 5C will be even harder on them due to the angle of the lands, but as far as how much the lands are cutting in a 3 groove lilja is the worst, and they are usually slower velocity wise but they make up for it in accuracy and ease of cleaning. I favor 4 groove cut rifling myself, but everyone has a preference.

 

[Edd]

a 4 groove krieger or brux will be harder on them than a conventional 6 grove, yet a 5R or 5C will be even harder on them due to the angle of the lands, but as far as how much the lands are cutting in a 3 groove lilja is the worst

Would you explain the logic of that hypothesis.

 

[backwoods83]

Cross sectional bore area, less lands typically means they cut tighter, more friction but also more accuracy in most cases, the different shaped lands R and C's also squeeze in a different fashion but last longer and are easier to clean. Think of it like this, with a conventional 6 groove after the lands cut its just kinda skimming on through, take half of those grooves away and it has to be tighter (only by about .0005-.0007") to spin the bullet up as fast, less surface area. I don't know if that explains it for you or not, but this is from my observations, kevin cram, kirby allen, or shawn carlock may have a better explanation.

 

[coues7]

Most factory 243 Win's come with a 9-1/8 or 9-1/4 twists. I'd be interest in knowing if anyone has been able to get good groups out of those twist rates.

 

[backwoods83]

You can do good with the 26" 9 1/8 twist at 5000ft + altitude in warm thin air, but the 95grn vlds do much better, in a normal sea level condition you would likely have to have a MV of 3350+ to stablize them in a 9 1/8 twist.