Ridge_Runner":1svsidav said:the hunting bullets shoot very very well, in my 6.5, groups mostly average 2.5-4" at the range of around 800 yards with a couple groups bordering on unbelievable, they shoot no better nor worse than the thicker jacketed target bullets. I've read nothing on cut vs. button rifled barrels and thin jackets that was scientificly tested, this is actualy the first it has came up on a forum.
I have however witnessed the difference in expansion of bullets because of higher rate of spin with a faster twist barrel in 223 cals. my 8 twist always leaves a bigger exit than my 12 twist shooting ultra-max reman 55 gr sp ammo, though it shoots about 60 fps slower it has a spin rate of 93K rpm more than the 12 twist.now just for kicks and grins my 6.5 has an 8 twist at 3160 fps will spin the bullet approx. 285,000 rpms, if it were a 9 twist and say would run the 140 a bit faster say 3300 fps, then it would generate 263,000 rpm's, a 10 twist at 3300 would run 238,000 rpm's. this makes sense but there are many calibers that will drive the 140 much faster (6.5 stw, 6.5/300 weatherby, 6.5 allen) so it seems that if those shooters tried a berger it very well could shed its jacket in flight if they are that volatile to high rate of spin.just ramblings of a dumb redneck country boy!
Great info RR. Sounds like something is voodoo in the mix for the Bergers anyhow. I read about Df having the 180 Berger's out of his 7WSM not make it to the target as well, and I was just wondering as I thought his was a cut rifled barrel as well? Again, more ramblings of yet another country boy! Scotty
RR