Bullseye, 9mm Luger, and 115gr FMJs

[CortJestir]

Search is kinda funky right now, so forgive me if this has been covered...

So, in my Lee manual the suggested start grains for Bullseye with a 115gr jacketed bullet is 5.0gr. The max is also 5.0gr. I can't correlate with Lyman as the manual does not have any data for 115gr FMJs. From what I've searched on here and other sources, 5.0gr seems a bit hot to start.

I'm loading for a SIG P239 and SIG P6/225 and plan to use for casual target and practice.

Would you recommend I start at 10% below at 4.5gr? Lower? Please share your experience with this load.

Many thanks,
CJ

 

[Loader9]

They can get by with that data as they are using a fairly long COL of 1.120. Any shorter and pressure would go up a lot. I would not suggest starting at 5.0 grs but something like the 4.5 grs you are talking about. I don't use Bullseye for anything anymore. It's just nasty to clean up after. I prefer much cleaner burning powders which usually means more powder in the case. I use AA5 in a 9mm almost exclusively because of it.

 

[CortJestir]

Thanks Loader9. I have a test batch of 10 of these rounds with OALs between 1.150" and 1.155" (IIRC, they are definitely above 1.120", though). But I think I will pull them and play it safe with a lighter load.