Cycling issues with cast bullets

[Sunray]

3.9 of Bullseye is just the starter load for a cast 125. And your pistol has to be set up to shoot SWC's. I'd look at the OAL first though. 1.113" is too short. Load 'em to 1.169".
The OAL has nothing to do with the powder. The OAL should be the same.

 

[Dudedog]

Funny,
none of my 9mm's are set up special to shoot semi wadcutters, and all seem to shot the MBC SWCs fine if I use an OAL that works. (shorter than my other 9mm loads)
I don't think longer is the answer with that bullet.


Shorter OAL = less case volume.
I would tend to think shorter OAL = less powder or more pressure.


Sorry for the duplicate post above, missed it, to late to edit and say delete.

 

[Bumpa4719]

We have a winner!!

Well since I started this discussion I should report back. Thank you everyone that submitted input. Dudedog I went with your formulation as well as the others that said to shorten them to a fingernail's width showing on the shoulder.

I loaded the MBC 125 cast SWC with 3.9 Bullseye with an OAL of 1.063 and they cycled fine in my Sig 250 9mm subcompact. They shot fine without too much recoil. The empty cases looked fine also.

I checked the height of the powder with the depth of the bullet and I do not think that the bullet compressed the load at all or I would have backed off on the powder a bit. It was just to the top of the powder; so I think I have a winner. I will reload a bunch more and run them through my son-in-laws Sig and my daughter Ruger LC-9S but I expect everything to be fine.

As an aside we had shot some into a woodpile back stop and when Joe was splitting the wood he found two SWC bullets and they were in almost perfect condition. One even had some lube in the lube ring. The bases had expanded ever so slightly and were still perfectly uniform. Surprisingly the head of the bullet did not deform when going into the wood. The wood pile had been covered with 2' of snow but I still would have expected some deformity.

Thanks again everyone!!

 

[LiveLife]

I love happy endings.