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Re: What powder are you using for 75 bthp in ARs? [Re: auk1124] #14572848 02/14/20
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Originally Posted by auk1124
8208 is unobtainium so I may end up trying Lever next with the heavies. An adjustable gas block should address any potential gassing issues.

If 8208 ever hits shelves again I will definitely pick up a jug.


That makes sense.

Also, in lieu of 8208 try Benchmark. It's a very slightly different burn rate but very close, and gives excellent accuracy in mine with the 75gr BTHP. I use 23.5gr of Benchmark and WSR or S&B SR primers for 2680 fps from a 16"; you can push it hotter but that is the accuracy node that seems to work across a few different rifles.

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Re: What powder are you using for 75 bthp in ARs? [Re: auk1124] #14573073 02/14/20
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AR-Comp is also very close to 8208.

MM

Re: What powder are you using for 75 bthp in ARs? [Re: Yondering] #14577895 02/15/20
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Originally Posted by Yondering
Originally Posted by antelope_sniper
Originally Posted by David_Walter
Would/should that be safe with a 40 grain 223?


Dave,

You couldn't put enough Lever behind a 40gr bullet in a .223 case to cause any problems.

Look at something similar of similar burn rate like CFE-223.

You are not going to get 32 grains of lever in a .223 case....


I think you are probably right, but I wouldn't make that assumption about Lever just based on Quickload. It might work well under a 40gr 223, but you may run out of powder room a little below max.
I'd have to check this evening, but since 29.0gr of Lever fit in my 20 Tac cases easily, I think a normal 223 case should fit at least 31gr, don't know about 32.

If you want to use a different powder for 40gr 223, forget CFE223, Ramshot XTerminator is where it's at. When I was shooting a lot of the 40gr V-Max and BT, XTerminator gave the best accuracy and velocity in that old Rem 788. As a point of fact, best accuracy with all of the bullets I used in that range happened close to max loads.
Also - use the Western Powders load guide for that stuff.


I followed up on this today. As dropped from my RCBS powder dispenser, my sized LC brass holds 31-31.5gr of Lever, full to the top of the case neck. With a little tapping to settle the powder, 31gr is about halfway up the neck, and 32gr fits without overflowing. However, it's still too slow/bulky for best results with a 40gr bullet.

I tested it with the 40gr and 50gr V-max today in my 16" 223 Wylde, working up to 31.0gr of Lever under both. The 50gr Vmax averaged 3445 fps, which was similar to the 3415 fps that my standard load does with 28.6gr of X-Terminator. (Yes, that X-T load is high for 223 specs, but about right in line for 5.56 data if you interpolate a little bit with what Western Powders publishes. It's also a load I worked up that gives good case life and accuracy in cooler temps like right now, but should be backed off a bit for hot summers.)

The 40gr Vmax with 31.0gr of Lever did 3410 fps, indicating that Lever is just too bulky for best results with that bullet weight. X-Terminator and a couple other powders can do significantly better with the 40gr.

Just based on what I saw today, I think in my rifle's 223 Wylde chamber at least, Lever is probably better suited to 55gr and heavier bullets.


Also for comparison - this same rifle with the 75gr BTHP / 25.5gr Lever load mentioned by The Kid does 2720 fps, at least in these cooler temps (~45° F). That load can be pushed over 2800 fps in this rifle without sacrificing case life, as long as the gas is turned down. It's not at all friendly to suppressor use though, with a lot more gas in the face compared to the Benchmark or 8208 loads described above.

Re: What powder are you using for 75 bthp in ARs? [Re: auk1124] #14577906 02/16/20
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I'd trust AR comp in anything from 69-77 grains, only because those are the weights I've used it in. AR comp is a very forgiving powder and burns clean. Works great in all of my AR rifles, which include 223/556, 6WOA, and 308W. I can't say the same for 8208, which I did not like as well...


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Re: What powder are you using for 75 bthp in ARs? [Re: Yondering] #14581162 02/17/20
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Originally Posted by Yondering
Originally Posted by Higbean
How much Lever in your 20 Tac load Yondering?


I'll have to look it up tonight and get back to you. Pretty close to a full case, but could still be loaded on a progressive without spilling.

Edit - forgot I had it in my chrono data here - 29.0gr.

LC17 brass
40gr V-Max @ 2.255"
Lever 29.0gr
3917 fps at the muzzle

That shoots better than any other load I've found in that rifle, but I could not find any published Lever data and worked up to it myself. Use at your own risk of course.


Thanks!


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Re: What powder are you using for 75 bthp in ARs? [Re: auk1124] #14581304 02/17/20
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Anyone using Shooters World Tactical Rifle and the 75 BTHP?


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Re: What powder are you using for 75 bthp in ARs? [Re: David_Walter] #14582291 02/18/20
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Originally Posted by David_Walter
Anyone using Shooters World Tactical Rifle and the 75 BTHP?

Precision seems to be getting the most attention in the circles I frequent.


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Re: What powder are you using for 75 bthp in ARs? [Re: auk1124] #14583224 02/18/20
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Precision in a 5.56?


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Re: What powder are you using for 75 bthp in ARs? [Re: David_Walter] #14585552 02/19/20
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Originally Posted by David_Walter
Precision in a 5.56?
Yep. Word is it's within a few fps of Varget.


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Re: What powder are you using for 75 bthp in ARs? [Re: auk1124] #14585777 02/19/20
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Thanks.

I can't get Varget to meter well in my Dillon RL550, but it's most accurate with this bullet.

If Precision meters better than Varget, I need to get a jug...


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Re: What powder are you using for 75 bthp in ARs? [Re: auk1124] #14591174 02/20/20
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Right now Trailboss.

But my goal might be a little different than others. I've been using CFE a bit lately as I picked up a bit of it a while back. If I was buying I think I'd look at IMR 8208.


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Re: What powder are you using for 75 bthp in ARs? [Re: MontanaMan] #14591401 02/20/20
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Originally Posted by MontanaMan
AR-Comp is also very close to 8208.

MM

So is AA2460.

kwg


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Re: What powder are you using for 75 bthp in ARs? [Re: kwg020] #14593297 02/21/20
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Originally Posted by kwg020
Originally Posted by MontanaMan
AR-Comp is also very close to 8208.

MM

So is AA2460.

kwg


AA2460 is close to 8208 in what way? Burn rate - sure, but so are a bunch of other powders.

Those two are different in just about every other way - charge weights, max velocity potential, temp sensitivity, powder type, etc. 8208 is a short extruded stick powder, 2460 is a ball powder. 8208 is relatively insensitive to temp changes, but 2460 is pretty sensitive at least in 5.56 with heavy bullets.

Maybe you were thinking of a different powder, not 2460?

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