300 bo cast bullet powder

[Lloyd Smale]

got some brass coming and orderd a 155 2r mold. Ive got a pile of different powders. Whats the one to start with for supersonic loads with that bullet checked and coated and pushed. What about primers? pistol or rifle? Going to be shot out of a 16 inch ar.

[Elkins45]

H-110 2400 4227 Li'l Gun These are the powders that you see mentioned most often. 1680 is all the rage but I din't see how it's all that great myself. I've been experimenting with 300-MP with decent results. Since you didn't mention trying to shoot suppressed then you don't have to worry about gas volume.

I've never used pistol primers with Blackout.

[Finster101]

I believe AA1680 is mostly used for subsonic loads, especially in an AR platform to get proper cycling.



125 NOSLER B-TIP 19.4 1,925 21.5 2,126 39,257 2.165 130 BARNES T-TSX 17.0 1,704 18.9 1,923 44,632 2.065 150 SIERRA HPBT MK 19.4 1,895 21.6 2,086 51,553 2.150 150 SIERRA FMJBT 19.5 1,877 21.7 2,057 54,564 2.140 155 SIERRA HPBT MK 18.6 1,817 20.7 2,010 49,099 2.190 168 SIERRA HPBT MK 17.8 1,667 19.7 1,840 54,268 2.200 175 SIERRA HPBT MK 17.7 1,637 19.7 1,801 54,855 2.215 210 BERGER BTTLR 14.4 1,403 16.0 1,582 54,216 2.245 210 SIERRA HPBT MK 12.9 1,308 14.4 1,458 50,189 2.170 220 SIERRA HPBT MK 10.9 1,085 12.0 1,263 40,075 2.089 230 BERGER THOTM 10.9 1,106 12.7 1,288 46,157 2.245
210 BERGER BTTLR 11.2 1,102 27,489 2.245 210 SIERRA HPBT MK 11.0 1,092 32,821 2.170 220 SIERRA HPBT MK 10.7 1,081 37,267 2.089 230 BERGER THOTM 11.0 1,106 37,882 2.245
210 BERGER BTTLR 11.7 1,104 23,796 2.245 210 SIERRA HPBT MKL 10.9 1,089 26,589 2.170 220 SIERRA HPBT MK 10.9 1,085 32,296 2.089 230 BERGER THOTM 10.9 1,106 33,056 2.24

[jmort]

Agree ACC 1680
Have not seen any cast data, but it may out there

This is with SR primers

150 Sierra HPBT MK Accurate AAC-1680 19.4 1895
Remarks: start load; COL: 2.150"
150 Sierra HPBT MK Accurate AAC-1680 21.6 2086
Remarks: max load; COL: 2.150"; 51,553 psi
150 Sierra FMJBT Accurate AAC-1680 19.5 1877
Remarks: start load; COL: 2.140"
150 Sierra FMJBT Accurate AAC-1680 21.7 2057
Remarks: max load; COL: 2.140"; 54,564 psi

[mattw]

Supersonic cast, my goto is 4227 with a pistol length gas system.

[Texas by God]

I want to try AA1680 but would have to order it so I'll just stick with 296/H110. A 150gr at 1800 fps is nothing to sneeze at. It seems the guys having cast success are using PC. My 16" 1-7" likes j-words the best. My current deer load is the 150gr Speer FP and it works as a repellent because I never see deer when I carry it!

Sent from my SAMSUNG-SM-G930A using Tapatalk

[Ia.redneck]

I've have an accurate load in my 16" AR. Consists of the Lee 311-155, sized .311, pushed by 18gr of CFE Black. Seated to 1.980 If I powdercoat it, the nose is too fat to chamber. Just lubed in lube sizer. I'm gonna try HiTek coating them and see if they will chamber.

[Hamish]

Lloyd,

I'm shooting that bullet and the NOE 310-195 MX2-30H over 15.7 of Reloder 7 and its all I could ask for.

[tsubaki]

For what it’s worth, one of the loads I’m playing with is with Lee’s c309-160-R (166gr actual) with AA2230 and CCI400 primers.
Checked and powder coated sized to .309, COAL 1.940” which puts it in the upper lube groove.
18.0gr averages 1492fps in the 16” barrel and 1371fps in the 11 1/2” barrel.
I recently upped the charge to 18.5gr and the 7 1/2” barrel gets 1315fps.
These loads grouped good and had no problems cycling in three different AR’s.
From Lyman’s 50th Edition.

233500

[tsubaki]

By the way, not all magazines are created equal.
If you have a problem with round nose bullets chambering, swap the magazine to a different manufacturer. Certain manufacturers feed lips are longer than others.
For me, the regular ole 20 round GI magazines have yet to create any problems.

[Lloyd Smale]

Ok I looked and have about 10lbs of 110 so that's going to be my choice. So should I use a small rifle mag or standard primer or can I use small pistol primers. Gun will be an ar15. Ive shot small pistol mag primers with absolutely no problems in 556 ars. What primer have you had the best luck with using 110?

[Rick R]

I shoot mainly super sonic jacketed out of my two .300blk ARs. I’ve been using either S&B small rifle or CCI #41 with good results. I’d think that pistol primers would be a bit soft and worry about slam fires.

[mattw]

I've have an accurate load in my 16" AR. Consists of the Lee 311-155, sized .311, pushed by 18gr of CFE Black. Seated to 1.980 If I powdercoat it, the nose is too fat to chamber. Just lubed in lube sizer. I'm gonna try HiTek coating them and see if they will chamber.

So, that is the exact problem I ran into. They would sometimes chamber and sometimes not, played with OAL and got a little better but not good. I have an NOE 311414 clone on the way that I think will fix that problem.

[mattw]

Ok I looked and have about 10lbs of 110 so that's going to be my choice. So should I use a small rifle mag or standard primer or can I use small pistol primers. Gun will be an ar15. Ive shot small pistol mag primers with absolutely no problems in 556 ars. What primer have you had the best luck with using 110?

I love H110, but have had issues with rapid pressure spikes in the 300 BO. I could be bullet fit, but I am not sure yet. Out of all the loads I have been testing, H110 is the only one that has blown a primer and the other 4 in the ladder group still had curved edges on the primer. I went to 4227 and have not had any primer failures and I am still right around 1800 fps with a 165 cast Lee.

H110 needs a start load of 10 to 12% below max and it needs a good crimp to build pressure. If not crimped well, it will not perform well. I did get SD's in the high single digits and low double digits with it, but did not feel good about how it reacted in the AR. I will try it again when my 311414 clone comes in, it will be a better fitting bullet. Without nose sizing the Lee I was using just had to much engagement in the barrel.

[jonp]

2400 or H110 and srp is what I use in mine, Lloyd

16in barrel.

[HandsOff]

Shooters World Blackout (Lovex D063-02) is a cheap(er) AA 1680 "equivalent". Some people on a 300 BO forum claim they actually like it better.

[jimb16]

I use a lot of CFE Blackout.

[Moonie]

With the lee 312 155 boolit I use 15.3gr of H110/W296, cycles carbine length and pistol length gas. I don't remember right off the velocity but I think it was low 1,800's.

[skeet1]

Tsubaki,
Your gun likes the GI type magazines but I got nothing but jams out of them. I tried Magpul and everything has worked great since. It just goes to show that every gun is different and I would suggest to anyone that's having problems with jamming should try a different type of magazine before giving up. I love my Blackout, it is an ideal cartridge for cast bullets due to the velocity range it works in. A lot of guys are using powder coated bullets but I have stuck to lubed and sized bullets as I'm kind of old school.


Ken

[jmort]

Lancer magazines are said to be the most forgiving with cast bullets.

[Wansingct]

I use H110 for anything under 125 grains, Lil Gun for 125-150 grains and 1680 for subs (usually 200-230 grains). The H110 and Lil Gun are usually loaded with about as much as I can fit in the case while subsonic loads are loaded as low as will cycle the gun.

[dogmower]

i have a 16 franken ar with a 1/8 twist barrel. the upper was purchased as a kit from CDNN and put on an old lower i have laying around. i shoot a lyman 311413 over imr 4198 (18 grains) for supersonic, and the lee 230 grain over 10 grains imr 4227 for subsonic. both powder coated and sized .309. the subsonic will shoot a fist sized group at 200 meters, the supersonic the same out to 300 meters or so. never had luck with 1680, h110 or lil gun. YMMV.

[adcoch1]

H110 is my go to for supersonic, I haven't built any subs yet and I need to. Also need to finish the suppressor. Tagging along for this one...

[cwlongshot]

For me 296/H110 are primary. 4227 has produced my tightest groups with 150’s.

http://img.photobucket.com/albums/v465/CWLONGSHOT/A%20Lead%20Depositor%20Display/RARR%20300/image_zpsyuuvyrqy.jpg

AA1680 is a awesome powder and works VERY well for subs and supers over 150g. Not great with lighter supers but useable.

Here is some targets, shot with the new Speer 150 GD built for the 300 BO.

http://img.photobucket.com/albums/v465/CWLONGSHOT/A%20Lead%20Depositor%20Display/RARR%20300/E0EC669E-742E-4C24-8393-BC27B4EF94F6_zpsojb17r8q.jpg


Trail boss is a fun one for light loads with lead!! Also 4.5g of TB and a 90G XTP is a nice small game load! (Not really a AR friendly load or powder)

I have used many different powders and like all cartritages many powders work.

If I had to choose one it would be 296/H110. I dont shoot many supers.

Good
Luck Lloyd!

[Lloyd Smale]

I guess I have to question the 4227 and lilgun for 150 or heavier bullets. The difference in burning rate between 110/296 vs 4227 vs lilgun is pretty minor. If I felt the need for a slower powder I think id skip up to 1680. I do know that some guns like certain powders and loads better then other loads and might be worth playing with but there close enough in burning rate that your not really gaining a measurable amount of velocity advantage with any of those three at book pressure levels. Personaly I don't like and wont use lil gun in anything anymore. It just burns to hot and heats up metal real fast if a mag dump is something you might do and 4227 is a dirty burning powder that leaves little kernels of unburnt powder (or filler) in every orfice of a gun. 110 burns clean as does aa9 and there military equivalents as does 1680 and burn cooler then even 4227 does. I will no doubt give 4227 and 1680 a run but lil gun NO THANK YOU. Once did a test with my 50 beo. I loaded 10 rounds of ammo with 110 and 10 with lilgun. Shot both as fast as I could pull the trigger. The 110 loads had the barrel to hot to touch but barely. the lilgun load had smoke coming off the barrel and you could have darned near lit a cigarette off of it just ahead of the handguard. Even have to wonder if that heat wouldnt effect coated bullets. Oh for the good old days of wc820 wc296 and wc297. I still have two jugs of 820 but that's all that's left and replacing it a guy might as well buy commercial powder. At least with it you can work up a load and buy some more of it 5 years from now and not have to start load development all over again. Best load ever in my beo was 297 pushing berry plated flat points. Problem is I don't have any more! Look at suggestions id bet 297 would be THE powder if a guy only wanted one for sub and super loads. Now keep in mind I have absolutely not experience with the bo and could be smoking crack here.

[Sig556r]

Lloyd,

I'm shooting that bullet and the NOE 310-195 MX2-30H over 15.7 of Reloder 7 and its all I could ask for.

+1 on Rx7...works well suppressed or not for my pistols & carbines even on my Ruger RAR

[Ed K]

Slightly slower twist than normal for jacketed seems to be the standard recipe for setting up cast boolit specific firearms on this site. How does that figure in here when most everyone's AR has a faster than normal twist for subsonic jacketed 300BO?

[mattw]

My barrel is a 1:8, I really would have liked 1:9 as most of my shooting with be with cast or 165 and lighter jacketed. But, it does seem to handle 150-165 cast pretty well.

[Lloyd Smale]

well God was smiling on me today. Looked in the powder locker and way in the back there was not one but two 8lb jugs of wc297. Wish I could find data for it but I searched all over and found none. Guess ill have to take a swing and see.

[MTyotehunter]

Anyone shoot cast from a Ruger American 300bo? Have a friend looking for subsonic cast load suggestions

[osteodoc08]

I’ve used 296 the most with supersonic jacketed Loads. I’ve played with 4227 and CFE BLK as well. CFE BLK has great load density and has had low SD for me but not the velocity of 296. Lilgunnhasnt given me the accuracy 296 did somit was abandoned early on. With cast and PC, I’d probably look at 4227 if you have that. CFE BLK is also reported to be a “gassy” propellant and may be a good choice with lower velocity loads that will still function.

[Gamsek]

Anyone shoot cast from a Ruger American 300bo? Have a friend looking for subsonic cast load suggestions

I do. I use 4.5grs TrailBoss for 130grs 311410, and 6grs for 151grs 312-159 (308 Hunting) and 180grs 311-180 Sil for subsonic velocity with small pistol (SP) primer. Have used few fast burning powders as N310, Unique....5grs with 150grs. All cast and PC. RAR, 300blk.
https://uploads.tapatalk-cdn.com/20190123/3efd61c30a16e0e39662c78bcd2d8a1f.jpg
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[Moonie]

Lancer magazines are said to be the most forgiving with cast bullets.

I can attest to this, I use only Lancer mags for my 300BO AR.