AR-10 Pistol

MasterChief · Feb 27, 2020

I have been thinking about making a AR-10 style pistol. I am wondering if I should build out a 7.62x51 (.308) or a 6.5 Creedmoor and looking for data for FPS and ft/lbs at different ranges. The barrel would be between 12 & 14 inches but would like to see the comparison with a 16 and 18". I would like something clear and concise like the attached image for 7.62x39 and 6.5 Grendel.

Thanks for your help!

MC

CamoDeafie · Feb 27, 2020

.45 Raptor? Basically a rimless .460 SW using .308 based case? Requires modified mags and new barrel but I don't know what lengths the barrels are in?

Certaindeaf · Feb 27, 2020

Check this out. The .308 truly sucketh with a short barrel.

MasterChief · Feb 28, 2020

Thanks CD.....have one for 6.5 Creedmoor?

Certaindeaf · Feb 28, 2020

MasterChief said:
Thanks CD.....have one for 6.5 Creedmoor?

No, I'd check out Ballistics by The Inch..

osprey · Mar 2, 2020

I think the Creedmoor will be similar to the 308 with regards to velocity loss. It may gain some ground at longer ranges due to superior bc of bullets but who builds a pistol or sbr for long range. My advice would be stick with the 7.62x39 or the grendel.

Ura-Ki · Mar 2, 2020

Your going to really loose a lot of the .308's power with barrels under 17 inches! I would look at ether a bull pup, or a different caliber then ether of the options posted!

CamoDeafie · Mar 2, 2020

Ura-Ki said:
Your going to really loose a lot of the .308's power with barrels under 17 inches! I would look at ether a bull pup, or a different caliber then ether of the options posted!

This is why I'm thinking maybe something similar to the .45 Raptor which supposedly have similar performance as the 460 SW, which is a big pistol round.

Although I see that the barrels available for the .45 Raptor are mostly 16-18" with some shorter bolt action barrels and custom orders from McGowen Precison in Montana...

Bill Siegle · Mar 2, 2020

I have a friend who swears by the 6.5 Grendel in his AR pistol.

osprey · Mar 2, 2020

If you are looking for thump out to a couple hundred yards or so the 458 socom is a beast and feeds and functions well. I have 420gr wlngc bullet going 1550 or so out of a 16.25" barrel. Quite a few more bullet options in .458 vs .452.