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NADA.. I modified Magpul Pmags and they work great.

THX!! Rifle is in Cerakote Muddy River and furniture is flat dark earth.. It has a different scope now also. A Leupold 6.5-20 30mm tubed Vari-X3, side focus, varmint reticle.

This is my 1st 6x45 I built. OD green furniture and the metal is Cerakote Forest Green. I did change the buttstock to a Magpul ACS. I might sell this one.

It's a fun gun..80gr Barnes TTSX bullets close to 3400 FPS..

Not bad at all from an AR-15.. My Oly AR-15 24" upper in 243 WSSM stays right with the 243 Win. 62gr Barnes Varmint Grenade with 52.5 grs of Ramshot Hunter zooms out at 3975 FPS

it smokes the 30'06 with the same 150gr bullet

Check out the 300 OSSM. Olympic Arms makes it. AR-15 Upper, 150gr bullet at 3040 FPS.. Its basically the 243 WSSM necked up.

That's the beauty of the AR platform. They've advanced so far and become so versatile since my 1st M-16 A1(made by General Motors). I've got 2 in 6x45, 2 in 6.5 Grendel, a 50 Beowulf, a 243 WSSM, a 223 and a 338 Federal in the DPMS LR platform.

I'll take some pics of both 6x45 AR's I have.. Greg

Well, went out and test fired the 6.5 today. Just one round for function/chamber check. I didn't have any "good" bullets so I just loaded up a cheap 120gr Privi-Partisan HP that I bought in bulk to use as plinking rounds in my 6.5 Grendels. I can only load single shot until this next week when I...

These 6x45's in AR's are just plain sweet. Just got back from test firing my newest build. I started with the gas port at 0.81" but it wasn't cycling properly(ejecting but the carrier wasn't going back far enough to pick up another round. I went up to 0.085"(same as Les Baer uses in his 16") and...

Yeah, the lower pressures of the 6x45 compared to 5.56 allow that extra velocity. Its a slick little AR-15 round. I think for a light weight bolt gun, I'd just keep it in 243 Win for the extra power though.

It's not too bad. You should get around 3000 and change out of the 20". The 24" gets 3117. This is using Ramshot Exterminator.

With the 16" bbl I'm getting 2900+/- FPS depending on powder. I forgot about trying the 80gr Barnes TTSX but I can't find the speeds I obtained.

This newest bbl I put on a baked graphite black Cerakote finish. It matches the upper very close. I used a Mid West Industries free floating handguard. I used a YHM gas block with flip up sight and a DPMS detachable rear A-2 sight. I haven't decided on a scope yet. Might just sell the upper once...

So far only 55gr up to 70gr Nosler BT and 62gr Barne's Varmint Grenades

I just put together an upper I built using a Shilen CM bbl blank that I profiled/chambered. It's an 18" mid-length gas. I really like the 6x45, super easy to load for and brass is more than plentiful. Will probably get out tomorrow and do a test fire.

Any 6x45 shooters out here? I've got 2 of them in AR-15's. Maybe share some loads.

I've been using Ramshot Hunter with decent results out of my 243 WSSM 24" bbl'd Oly Arms AR-15 upper. With 52.5 grs of Hunter, I'm shooting .25" at 100 yards with the 6mm 62gr Barnes Varmint Grenades at 3975 FPS. That's the only load I tried with Hunter. It's shooting minute of Chuck head so I...

Received from Ramshot. Caliber: .280 Remington AI – Ackley Improved. Barrel length: 24” Powder: Ramshot – HUNTER®. (1st Choice) Bullet weight: 120 grains. Start load: 55.5 grains (2800 – 2900 Ft/p/sec) Maximum load: 61.5 grains (3100 – 3200 Ft/p/sec). Bullet weight...