![]() ![]() ![]() FMJ bullet, which I think is a boat tail with cannelure and intended to be roll crimped when seated (?). 22 conversion using a 1-9 twist barrel and 60gr SSS ammo from Aguila. I don't want to believe that Hodgdon would provide a recipe for using Trail Boss in the 223 unless it worked for them. The very best subsonic 223 load for any of these rifles is a. Maybe later I'll try some boat tailed bullets. MatchKings, the bullet I normally use for full velocity 223 loads, just isn't going to work with this powder in my rifle. That's OK, I think I've found what I was looking for- a bullet (40 gr.) that works at about 80% of 223 Rem case volume of Trail Boss powder. It was the first calculator I tried, and I discovered it came with the disclaimer about flat based bullets usually defying the Miller formula used. Velocity was 2750, I have a target with 15 shots in 5.5" 300 yards.Ĭlick to expand.Yes, I did try the Berger calculator. Since we are talking reduced loads, my best EVER was SR4759 behind a 55 grain bullet cast of pure linotype with a gas check. I also have been using a 17 HMR for squirrels and destruction is about the same. I could never get lower than 1600 fps and keep any kind of accuracy no matter what bullet I used. I only shoot squirrels and rabits attempting head shots. The rifle is a 222/20 gauge with a reciever sight, so 50 yard shots are max I can make. to get sub 223 loads you have to do a lot of researching for the right load and spend an awfull lot of time prepping the rounds. Using a 223 subsonic is no different that a. I get full stabilization and good groups out to 50 yards. 10.7 gr of Trail boss 1040 fps mag primers, win cases 3/4-1' groups at 100. I quit casting in 2006 due to lead poison, so I tried a jacketed bullet. Using pistol powder originally listed as a cast bullet load, I have great success. I have been using 40 grain bullets (hornet) in my 222 for years. Update: At 50 yards the bullet impacts are still sideways, just lower now so I'm confident more powder will be safe. There were no high pressure signs at 4 gr. While 4 gr is listed as the max load, its volume is nowhere close to the typical "rule of thumb" 70% case capacity Hodgdon suggests as a starting charge for most any cartridge. ![]() Next trial will be some more of these at 50 yards and maybe some with higher TB powder charges. Impacts of the bullets from the TB loads hit about 1.5 inches low and left. For comparison, I first shot some regular velocity loads using the same bullets, brass and primers, but with 27 gr of CFE223 powder. I'm not sure what is the twist of the barrel, but I suspect it's 1:14 or 1:12 slow. Nosler competitions, and they just didn't stabilize, several hitting the target board sideways creating perfect silhouettes in the paper of their shape. TB loads in my old Savage 110 223 Rem sporter at a 25 yd target, and while the energy/recoil was pleasantly 22LR rimfire-ish, the results on target were disappointing ![]()
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