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cactusjack

Ar15 in 6x45 or 6mm 223

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I have a 6x45 so far the best powder i tried is varget with 75gr bullets.I will say its the best yote gun i have ever used the just fall over drt.I think it would make a great coues rifle as long as you stay under 300 yds so the bullet would have the fps to open correctly.The nosler partion would be first with the barnes a close second.I used 4064 with the heavy bullets up to 100gr it worked well with all loads around 1/2 inch.

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I bet that is a kick in the pants to shoot. Have fun.

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I ran a 6x45 for quite a few years and played alot with it,. Also killed a bunch of stuff too.

 

Reasonable velocities in a 20 to 22" barrel are 2,750 to 2,800 with 85's, 2800 to 2850 with 80's, and 2,950 to 3,000 with 70's and 75's.....

 

Best 2 powders for me far and away for BOTH velocity and accuracy were Ramshot TAC and H335. Both are really good but H335 was generally a bit faster and more accurate.

 

I ran the 80 TTSX at 2800'ish and the 85 SGKHP at 2,725 or so. Both I could never keep inside a deer.

 

The 75 grain Vmax is also a good one. I could generally push this bullet to nearly 3K as it has less bearing surface the the 70 Btip which equated to higher velocities before pressure signs.

 

Neck up .223 brass, no fireforming required, and commence to shoot.

 

Good luck with it.

 

For deer specifically, I would have no issues running a 70 grain Ballistic Tip as I could hardly keep one of these in a deer either. At impact velocities of the 6x45, the 70 BT is far less frangible and gives excellent penetration.

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Shot the rifle in Colorado on a buddy's ranch last week. AWESOME! Was too giddy to remember to take pictures. We shot ground squirrels. Varmint Grenades do a number on them btw. Suppressed made it easy to hear if you hit or missed. Shot the 22lr subsonic suppressed too, best day of shooting I have had in many years.

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Its funny I never saw anyone with these but now I have seen 3 guys in 2 weeks at the range full auto suppressed. One guy had 3rnd burts going from a tripod like youurs it was very cool

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