New Here; Some Generic Barrel Questions ..

[Opus Dei]

Pardon me not posting a separate introduction, but I figure I can kill two birds with one stone. The Grendel chambering has piqued my interest; I have a couple of 5.56 rifles, one 5.45, and a .25/06. I'm considering this caliber as the happy medium to my current ones.

I've been doing a lot of reading about the Grendel, and I *think* I know what I'd want-a 20" barrel with probably standard profile. I'm not seeing a big selection of assembled uppers yet, but I'm sure that will improve with the recent SAAMI sanctioning. But I'm also considering the option of a custom assembly.

Given that, I have a couple of questions. For a 20" barrel and the range of commercial ammunition bullet weights, what is the best compromise twist-I've seen a bit of variation within a given length. Conversely, there are some advocates of progressive twist on shorter barrels in 5.56. Has anyone here an opinion or experience with (say) a 16" barrel in 6.5 rifled this way?

Thanks in advance for any help.

[RangerRick]

I've got a 20 inch Satern barrel with a 1:8.5 twist. I've shot from 90 grain to 130 grain bullets with no problem. I haven't shot in extreme cold weather, most of my shooting is at about 200 feet above sea level.

There are quite a few vendors for uppers. Call or e-mail Bob at Templar Consulting, he sells Grendel barrels with progressive rifling and can probably answer a lot of questions.

He can build you a barrel, or upper, too, if you like.


(877) 878-2334
bobjr@templarconsultingllc.com

RR

[Whelenon]

Welcome to the board, from what I've read 19.5" is optimum for the Grendel cartridge capacity. I agree, with the SAAMI acceptance we should start to see more Grendel product. I have no experience with the progressive twist barrels, but was very happy with the 16" 1-8 button barrel from AA.

[Rambozo]

Personally, of any non traditional rifling, things like 5r or Polygon are the most appealing to me. But having said that, traditional rifling remains the safe bet. Progressive rifling, I would be more weary of. Why? because it doesn't have a consistently static engrave angle. That means that it will sheer the jacket by having a change in twist pitch. Just imagine twisting a flathead screwdriver onto the surface of modeling clay. I would stay away from it, but that's just me.