300BlkTalk

If you’re maxed out for overall length, I would minimize headspace. Make sure the cases are fully fire formed and only set the shoulder back .003”. Depending on your chamber, that will be around 1.075-1.080. Maybe even longer, measuring with a .350” diameter insert which is most common. Just checke...

dellet wrote: ↑Mon Aug 22, 2022 11:01 am If you have the room, move the bullet out on the 8.0 load .020”

I am currently at .008" off the lands. Still have some things to try, but in the grand scheme of things, I'm reduced to wondering how important is BHO?

Update: Loaded up 7.8 gr, 7.9 gr, and 8 gr. Installed Lightest spring 8 gr - 1042, 1057, 1045. Only loaded one round first to check BHO. Achieved it, but subsequent shots did not lock back. 7.8 gr - 1040, 1025, 1028. All cycled, no BHO. Tried 7.9 and replaced the one tungsten weight with another ste...

That’s why I keep a standard spring, and both a carbine. 2.7 oz and an H2 buffer around. Trouble shoot with the parts it was designed to work with. Then modify. The brace I'm using uses smaller components than normal. The JP SCS XS is another option they offer. I could go with their version of buff...

Loaded up 7.8 gr, 8 gr, 8.2 gr, and 8.4 gr. None of them had BHO. But they were close. 7.8 - 1025 8 - 1060 8.2 - 1088 8.4 - 1110 Going to try a lighter spring and possibly a steel weight to replace the tungsten one on the standard JP SCS XS. Which brings up the question. Is it best to just try the ...

Loaded up 7.8 gr, 8 gr, 8.2 gr, and 8.4 gr. None of them had BHO. But they were close. 7.8 - 1025 8 - 1060 8.2 - 1088 8.4 - 1110 Going to try a lighter spring and possibly a steel weight to replace the tungsten one on the standard JP SCS XS. Which brings up the question. Is it best to just try the s...

Out of the powders you mentioned, I would try N110. 8-10 gr range seems pretty good, that's what I started with on my 6.5" barrel. If you don't have it already, download Gordon's Reloading Tool. It's just like quickload, but free. It'll give you an idea of where to start, what velocities you'll...

Alright, I just ran some numbers using GRT. Currently doing load development with N105 and 190 gr Sub-X. COL 2.09. 6.5" barrel with V7 proprietary gas tube (shorter than pistol gas). 8 gr of N105 got the bolt 2/3rds of the way back. Muzzle psi was 6880. If I seat out at 2.24 at 8 gr, muzzle psi...

What I normally do is find a charge weight that will cycle, then adjust velocity with seating depth. I would be interested to know the size of the gas port in your barrel. The shorter the tube the smaller the port will be. To keep from hyper cycling supers, it will need to be very small. That will ...

N110 190 gr Sub-X COL 2.09 W/ Ultra 9 suppressor 9.1 gr - 1013, 1012, 1008 ES 5 8.7 gr - 982, 976, 987, 969 ES 18 8.7 grouped a lot better https://i.postimg.cc/ydhxRHGh/IMG-20220806-094528401.jpg https://i.postimg.cc/0jW8G20S/IMG-20220806-095125079.jpg post a picture https://i.postimg.cc/d3KWW84P/IM...