I use H110 with the Hornady 240 gr XTP mags with good results. Can’t say I’ve tested them on game yet but accuracy is good and the velocity is heavy in the parameters of the XTP mag bullets.

 

See if Ramshot Enforcer will work in it?

 

I think you are on the right track. Nothing wrong with H110 anytime I have used it. As long as you do not reduce loads you will be fine.

 

I use A1680 with the Hornady 245 gr Interlock SP in my 450 BM AR. I haven't taken a deer with that combo yet but hope to this year if everything goes right. I would think H110/W296/Lil' Gun would also work just fine with 450 BM loads.

 

LilGun works great, especially with 225gr FTX bullets, around 43grs. I use them for plinking and they are very accurate in my BM AR15. Bolt guns maybe better with H110/296, I don't have one.

 

I did alot of testing and finally landed on Lil' Gun as my most accurate powder. I tried 296, 110, Blue Dot, 2400 but things really got accurate with Lil'Gun and the 250 grain Hornady gummy. I don't remember the exact load, but There is a whole forum dedicated to loading for the 450BM. 450bushmaster.net and pay attention and read all the posts by Hoot and definitely read up on the Legendre Crimp Post. Only way I could get those big bullets to keep from moving in the mag of an AR-15.

 

All I have used is H110 with the Hornady bullets. They shoot great for me but I have not shot a deer with one. I also use H110 for 357 mag and so far it works good for me. Like any powder to much or to little is a problem. Tite group is the one to watch as it is easy to over charge pistol rounds because it takes such a small amount.

 

Thanks guys. Guess I'm on the right track. Ret_Eng suggested AA1680, which I never considered. My Cabelas has multiple 8 pound kegs of that powder. I do have H110 and Lil' Gun in the powder vault already. So, will try them first along with a pound of AA1680 and by an 8 pounder of what works best.

The AR I have spotted in the shallows is a consignment gun my ffl dealer put together for a customer who lost interest in AR type rifles. It has a scope and base not to my liking and the owner doesn't want to separate. So, I put in an offer today for bare gun and will know by Monday if accepted. Otherwise, Windham weoponry will be ordered.

 

WW296 or H110 is the preferred powder. Just think of this round as well as the 50 Beowulf as a really big pistol magnum cartridge. The operating pressure is in the 30K to 40K PSI range.

 

That's what I wanted to hear!

So, are you a 458 Socom fan? Or is the 450 BM with .452 bullets good enough without adding another cartridge? Just curious because these big bore AR cartridges intrigue me.

 

Yes, I understand the correct mags. If I get the Windham it comes with their mag. If I get the consignment gun it comes with a modified 30 round mag my ffl dealer modified to work with a pin to keep the follower. Personally, I just want a flawless working 5 round mag for the BM. What's the best out there?

I like the reasoning behind the .452 pistol bullets in the BM because they will expand well. I do have some Sierra 300 grainers on hand from a modern 45 Long Colt project. Will the 300 grain Sierra's feed ok in the 450 BM?

I'll see how the 450 BM works out before I get too interested in the 458 Socom. Hate adding another cartridge with hard to find components. However, long as we are talking. Who makes .458 bullets that expand well at 458 Socom velocities?

 

However, long as we are talking. Who makes .458 bullets that expand well at 458 Socom velocities?

Maker Bullets is all about quality Subsonics, even the 458...
Prepare to be amazed, explore their facebook page.
I drank the koolaid on their High Velocity bullets.

 

This is my 450 BM and with this stock it handles fine.

 

This is my 450 BM and with this stock it handles fine.

View attachment 912982

I like it! What mfg for rifle and magazine?

 

Try your 450 BM first. As far as 458 SOCOM any 300 grn expanding soft point bullet should work okay on hogs. It uses the same bullets as a 45-70 (458 diam). Since you should not shoot lead in an AR you will be limited to jacketed bullets. 458 SOCOM loads are approx 2400 FPS so that is about double what a 44mag will do.
I have been using C-products 450 BM 5 rd mags for my upper and have had no issues. You can modify a 5.56 mag but you will need to change the follower to a single stack one and then do some trimming at the front of the mag (requires testing at the range for reliability).

 

H110/W296 or Lilgun. I have tried 1680 in several cartridges and I never get close to what the velocity the manual says even using mag primers. For bullets, I like the barnes 275gr. The Hornady 245FN interlock and 250gr ftx leave a lot of bloodshot meat behind. For mags, the C-products Duramag is the best one out there I've tried.

 

Thanks guys for sharing the wealth of knowledge. Will report back after getting a BM in my hands.

 

I should add I'd go with a heavier profile if you can if going with an AR15 plarform. I got a few shilen profiled 2nds due to gas journal location (needed an extension, headspaced, and the gas block journal set back a bit) that were a standard profile (.860" under handguard, 3/4" gas block, .735" out to the 5/8"-24 muzzle threads which is actually sort of light since the bore isn't .223. I usually make mine about .920" under the handguard, .875" gas block, .820" out to the 11/16-24 or 3/4"-24 muzzle threads. The added weight makes a noticable difference in recoil if you're going to be shooting it much.