Printable View
Gonna build a 6.5 CM strictly for hunting. Planning on 140 gr. bullet in a 8' twist. I want to go as short as 19" if I can get good stabilization. All shots will be under200 yard. Considering ER Shaw for the $$ factor. Barrel profile will be standard hunter
I wouldn't go any shorter than a 22"... I just built a 260 rem match and went with a 25" Criterion barrel. Get's 2750 FPS with a 143 ELD-X...
Yeah a 19" should work just fine for what you want. It will stabilize the 140s with the 8 twist.
I shot 140's out of my 20 inch barrel out to a thousand yards and it worked just fine.
what about a 9 twist?Quote:
Originally Posted by Rob01
Would be marginal at best. You would be better off with a good 130 and with the distances you are talking about a 130 would work just fine.Quote:
Originally Posted by needagun
Yeah it would be close especially with the lower velocity of that shorter barrel. 120-130 would be a better option.
Depends upon the bullet. A Speer Hot-Cor doesn't need nearly as much RPM as a Berger VLD, remember that stability is required for a length; not a weight.
Velocity will obviously be lower, but the Creed doesn't suffer nearly as much as many cartridges when used in a shorter barreled rifle.
MV * 720 / Twist = RPM
Even if you lost 200 fps, you are only looking at a rather minor RPM Loss.
2600 * 720 / 8 = 234,000 RPM Vs. 2400 * 720 / 8 = 216,000 RPM
True but he is only shooting 200 yards so he really doesn't need any advantage a 140 would give a long range shooter. A 120/130 would do everything he needs and give him a flatter trajectory.
I've watched guys shoot the CM out to 1K with a 15" barrel with success. They paid an entry fee for the match to do that, 19" will do the job.
Seen a guy shoot an 11" .308 to 1000. Hell Jerry Miculek shot a 9mm pistol to 1000. LOL
I completely agree, point was only that weight isn't the thing needing stabilizing; nor that a shorter barrel would cause him a significant downfall.Quote:
Originally Posted by Rob01
The 120-130's will do anything he needs, on most any game animal able to be legally hunted.
One can go very short if weight and maneuvaribilty are important factors.
Many 6.5 Grendel shooters successfully use 16" barrels for hunting medium game at ranges well beyond 200 yards. Some rouetinely hit steel with them ar ranges beyond 1000 yards.
Velocities for the Grendel are a couple of hundred fps less than those from the Creedmoor.
Bottom line: The OP can readily go to a 19" or even a 16" barrel and have a very effective hunting rifle.