Why does Precision Delta 230gr make my gun so dirty ?

[Pistolet]

To resume this long thread: I was experiencing some carbon fouling with Precision Delta .45ACP 230gr FMJ and Win 231 but none when using 200gr coated SWC. It seems like my barrel is oversized and that I need to use over sized bullets.

I had a talk with a gentleman from Bayou Bullets this morning (I should have gotten his name he may be the owner?). He had strong doubts that I need oversized coated SWC since the ones I have been using seem to work just fine they run clean and have good groups, he does have a good point.  With coated lead it's a case of "if it ain't broke don't fix it. I am happy not using FMJ anymore for this gun. Also He recommended Bayou 185gr SWC. and clays powder.

All I have to say, is according to our friend JLJ, when using lead...fit is KING.

Maybe coated will work at a smaller size...maybe not. I'm guessing o/size will work, coated or not for sure, and not cause any problems.

Who do you want to believe, the guy selling, or the guy reloading?

Disclaimer...I'm not saying the guy that is selling bullets giving you the advice is being disingenuous. It might just be his experience.

Okay. I have two questions: 1. who is our friend JLJ? 2. Are there any risks in using a bullet that is TOO oversized?

[painter]

JLJ is member jameslovesjammie. Search his posts.

He loads all 9mm at .358.

Define 'too oversized'. I'd say over .358 is 'too much'.

[Pistolet]

JLJ is member jameslovesjammie. Search his posts.

He loads all 9mm at .358.

Define 'too oversized'. I'd say over .358 is 'too much'.

So that's two sizes up from Bayou's 9mm 124 Gr. RN - Sized to .356 (Typical).

[painter]

Yes, with lead bullets he loads sized to .358. He loads bare lead, not coated.

Using jacketed bullets sized to .358 would increase pressures, and not be a good idea.