mont1120 Posted January 22, 2020 Share Posted January 22, 2020 Just started getting into the Open game with a used SVI .38 Super and had a question on OAL and MBX magazines. The load is a MG 115 HP with 8.4 grains of Longshot which gets me around 165-168 PF. I had set the recommended OAL at 1.245 per SVI. The problem I am having is the .38 Super rounds (not Supercomp), are hanging up in the middle of a 170MM MBX tube. My 140 STI mag does not have any such problems. After talking with a very helpful MBX person, I found the internal measurements of an MBX vs. an STI is different with less room in the MBX front to back. It was relayed to me to shorten the rounds because the shorter measurement and the rimmed Super cases would possibly cause the stacking issue. With this in mind, I ended up with a 1.209 OAL to finally stop the noses of the rounds from sticking and rubbing in the tube. Is this something others on this forum are seeing? My PF did inch up to 170, but there was not pressure sign difference at all. I just want to be sure I am not asking for trouble. If I didn't have 2k pieces of .38 Super I would not worry much about it.I would just move to using Supercomp which I load further out. Having shot Carry Optics for the last 3 years, I thought I would give Open a shot (pun intended) as it seems CO is now the crowded field. If I had decent eyeballs I'd go back to, yes, you read this, the dreaded L10 division.........Mom always said I was a little bit different. Link to comment Share on other sites More sharing options...
Balakay Posted January 22, 2020 Share Posted January 22, 2020 You have a tube issue. I have shot lots of super and SC with MBX mags at OAL 1.240-1.260 Link to comment Share on other sites More sharing options...
sauza45 Posted January 22, 2020 Share Posted January 22, 2020 1.209 seems short to me I am shooting 38 super comp and load out to 1.235 Link to comment Share on other sites More sharing options...
hdgun Posted September 23, 2020 Share Posted September 23, 2020 I ended up at 1.225” for super in the MBX mag. MG JHP Link to comment Share on other sites More sharing options...
AverageJoeShooting Posted September 23, 2020 Share Posted September 23, 2020 1.235 here. I tuned the mag feed lips so the bullet is pointed directly into the chamber and after that i started loading a bit longer to about 1.240 Both feed perfectly fine also using mbx Link to comment Share on other sites More sharing options...
mayassa Posted October 6, 2020 Share Posted October 6, 2020 I load at 1.245 with hollow base plated bullets in SC never any issues Link to comment Share on other sites More sharing options...
191138sc Posted October 8, 2020 Share Posted October 8, 2020 On 10/5/2020 at 8:26 PM, mayassa said: I load at 1.245 with hollow base plated bullets in SC never any issues This was my same experience. Sweet spot for faultless feeding was 1.245. Link to comment Share on other sites More sharing options...
mayassa Posted October 8, 2020 Share Posted October 8, 2020 11 minutes ago, 191138sc said: This was my same experience. Sweet spot for faultless feeding was 1.245. I'm glad someone else confirmed my data, now if they ever come back in stock after they were sold off. I only have 2K left then I have to work up a new recipe. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now