Hi guys I am new to reloading. I just loaded some .45 acp speer gold dots in starline brass with winchester large pistol primers and 8.1 grains of blue dot powder. The cases measured .004 over .888 trim to length before charging and seating. The speer book says coal TESTED was 1.20 and my bullets after seating measure 1.193 to 1.95 so a few thousandths under the coal tested. I also have a lee manual and a Lyman and most MIN oal is 1.20 does the .005 to .007 pose a potential pressure issue??? Do I need to pull all of these and reseat to 1.20+? I'm shooting it in a glock 21 gen 4 auto pistol.

Thanks for your help and advice!

A few thousandths shouldn't mean a thing. Fire them and see how they do---assuming your data lookup was good.

The recipe I listed is straight out of the speer manual. The reason I am asking is the gold dot much like the hornady xtp has a very deep hollow point cavity which changes pressure compared to a regular jhp.

Yes, I understand what you're saying. All that bullet weight has to be somewhere. But if I understand correctly, you are only concerned because you've seated about .007" deeper than specified. I think that is insignificant.

Are you experimenting with Blue Dot, or is it your go-to powder?

I used to load Blue Dot in .41 Magnum, but I moved on to 2400 a long time back. In the meantime, I had some unused Blue Dot on the shelf and then I began to hear some noise about Alliant warning against using Blue Dot in the .41 Mag. They still list BD in other revolver loads, but I'd never use it again in ANY revolver load until I know exactly why they threw the red flags on the .41 Mag. The way I see it, if it can blow up a .41 it might blow up any other handgun as well.

Anyway, if you're searching for a good .45 ACP load I think you can do better with another powder. I like W231 myself.