300 BLK loads ?

Anyone have any light weight loads for 300 BLK they want to share? Im building 300 BLK with 1-8 twist and 16 inch barrel. I have a 8.25 pistol that shoots the heavys. So I need loading data for 110- 150s in carbine length.

I loaded some 125gr sierra sp's flat base, over 17 grains of IMR4227, cci sr primer, fiocci 300blk brass. Shot out of a Remington 700 aac-sd 16" heavy barrel. Right around 1950fps and about 1 moa to 1.5 moa out of my rifle at 100 yards. Probably could shoot alot better with a little tweaking. I did not fireform the brass, I just FL sized it. Next load I will be working up is for 110 gr hornady sp's at 2300fps.

I don't have IMR 4227 BUT I do have H-4227,H-110., and RL-7. I hear W296 is suppost to be good for lightweights. My main goal is going to be to shoot 110 V-Maxs and 110 Barnes. I will be using 09 LC brass since I have a 5 gallon bucket of it!

17 gr of 296 with a 125 NBT has done well for me. Just picked up some 110 and 130 barnes that I gonna see what I can make them do. From all reports H110 and W296 are basically the same.

The hornady book actually only list H-4227 but if you go to the hogdon site it list the IMR4227 as well. They are almost identical from what I understand. The h4227 should do fine. If you have any LIL GUN or H110, they also work really good in the light stuff. All of my testing has been with a bolt gun. But I just got a radical arms upper that I will be shooting soon. So some of my loads will change I am sure.

H110 works very well with the lightweights: on 125 gr. NBT's I get 2115 fps with 17.0 grains to 2215 with 18.0 grains, 16" 1:8 barrel.
With 110 gr. TAC-TX 20.0 grains will get 2375 fps, 19.0 grains gets 2275 from 16" 1:7 barrel, have not chrono'd the 1:8 with these yet. Nosler 110 grain Varmageddon loads are similar and shoot very well also.



Most of these loads with CCI 450

Hopefully I can start around Sept 4 or so when I get all the parts I have orderd . Im building a Spikes Tatical Punisher Lower with Hardened Arms upper and Mag-pul stock and vertical grips. Gun will have a Armasight Zeus thermal on it and will be my main hog rifle

Sounds like a sweet set up. Pretty close to my 5.56 set up. Magpul stock and grip, hardened arms 5.56 upper vortex red dot (no thermal for me..... yet).
I have the same set up for my 300 blk except I used a radical arms roundrail upper.

Thanks. I have had really good luck with Hardened Arms. Except for their slow shipping, they are nice! I have built 3 in the past year. Sold 2 of them to friends. Keep the 8.25 pistol because it shoots the heavies so well.

Yessir. That was my ONLY complaint as well. The shipping was slow on my upper as well.

First upper I got from them I won on Gunbroker. I didnt read where it said = 7 to 10 bussiness days on shipping.

I asked about Lil Gun at the store where I buy a lot of stuff and he said the 300 blk guys around here buy it as soon as he gets it,

I found a 300 BLK forum online. Its pretty good. LilGun,H-110, and AA1680 are the top 3 accoeding to a online poll. H-110 seams to work well with everything from 110-220s!

H110 does work well it is just hard to find, and I have yet to see a can of AA1680 anywhere. I can find lil gun on occasion and I can get pretty much all the imr 4227 I want. Keep us posted on your loads.

I have been reading about W296 . Its suppose to be the same burn rate. I have 4 cans of H-110 and 3 cans of W296. H-110 and W-296 are suppose to work well wth 110-220s , we will see!

Got my new 300 BLK Upper from Hardened Arms today. 1-8 twist H-bar barrel. Started with 18.2 grs of W296, CCI 400 primers, PNW Brass, and 110 V-Maxs. Loaded 2.100 OAL . 2200 FPS. Was using Aimpoint Comp2 with a 4 MOA dot . Got 1/2 inch groups at 50 yards. Going to see about more speed 2morrow but for now I have a good load with the 110 V-Max

Have you tried Shooter's Warehouse in Cullman for powder? I haven't been by in a few months, but they had the best selection of powder and other reloading supplies I've seen in a long time and I've been searching in every sporting goods spot I can find from here to West Virginia. Looked for A1680 for two years and finally found it there. They had cases of it last time I was there. And it does work as advertised. It will cycle heavy subsonics in a carbine gas gun where H110 and Imr 4227 are iffy. A5744 works also. Both are a little louder through a suppressor. I've never tried either for supersonic loads though, 110 and 4227 are easier to find and both work well.

I highly recommend Shooter's Warehouse. I run Lil Gun for both subs and supers. I have a bolt gun.

Im about 45 mins from Cullman. Have been to Vans before, so I quess I need to ride up to Shooters Warehouse and check it out 1 day. I havent run any LiL Gun yet BUT I but, have a real good load with W296 and 110 V-Max.

Just got threw doing some night shoot with AR-15 pistol at AR-500 steel targets from 25 yards out to 150 yards. Worked up a new load. It really hammers! 1x Full sized PNW Brass, 400 CCI primers, 155 gr Bergers, with 16 grs of W296 with OAL of 2.150 . Fits and works well out of Green Gen 2 P-Mags!

What was your velocity looking like and what length barrel were you running?

10 inch barrel. 1-7 twist. Only shot 3 rounds threw CED M2. Only got 1625 fps average for 3 shots. Basicly was a = Steel Banging load. Using AN/Peq-2a IR Laser and L3 Omni 7 PVS-14 thin filmed Autogated , with Fast Ops Carbon Fiber Helmet!