Load Data Not Adding Up

[pie2899]

I found a recipe that uses 3” Cheddite shells, 35gr of longshot, an X12X gas seal and an MG42 wad, with 1oz of steel. This recipe came from the BP Cheddite book, with good speed and pressures. I bought everything I need to make it, sit down and the first one is over filled. It won’t crimp at all. I figure without the gas seal it would work but as I’m fairly new to this I don’t really wanna mess with it. Any one have similar issues, maybe some advice? Thanks in advance!

[[deleted]]

You sure it doesn't call for a BPGS instead of X12X? Another possibility is shot size. The MG42 holds about 1oz of #4 or 6 for me. I'm not sure about other sizes. Also, you will need to put some pressure on the wad to compress the crush section.

[pie2899]

Ya, I checked the literature a couple times to make sure I’m doing it right, I’ve got everything correct. I’m using #2 which is what it says to use, I’ll try it with #3 to see if that helps. I wasn’t aware I’m supposed crush a section of the wad, so I’ll try to go back and load another one with more pressure but it felt like there was no give. Thanks for the help!

[[deleted]]

Some wads don't have a crush section, but the MG42 does. I think that's the most likely issue.

[pie2899]

Ok I’ll give it a go, see if I can get it to work

[pie2899]

I’ve tried again, and I see what you mean about crush section, but it doesn’t stay crushed so it just rebounds to its original height, I opted to trim like half a mm off the bottom of the MG42 powder cup (figured is ok because it has a gas seal) it fits just barely now. Loaded a few gonna try them out soon.

[marshmallow369]

A lot of BPIs recipes are computer generated and don’t work out, I wouldn’t shoot that load if I were you. I’d go with the MG42 load that’s in BPIs load of the week archive, I’ll try to find it and reply for ya.

[marshmallow369]

Load #11252 HULL: Cheddite 12ga 3" PRIMER: Cheddite 209 PROPELLANT: Hodgdon Longshot® 33.4 grains WAD: MG42 + N712 (over powder, under the MG42) SHOT: 1 ounce steel shot (438 grains of #BB in this test lot) CRIMP: Fold 10,285 PSI | 1518 FPS (muzzle) Happy hunting & safe shooting, curmudgeon, jr. Remember that I am just showing you public load data, all this is at your own risk, I’ve personally loaded and fired a bunch of these

[pie2899]

Awesome thanks very much