molly coated bullets and accurate #9

[Arizonaman]

I have just purchased a glock 20 and a lone wolf barrel. I have loaded 5 rounds of 180 grain flat nose with 13.5 grains of accurate #9 with new federal brass. The accuracy was good and definitely felt snappy. I basically load it it as if it were a plated bullet. The brass or primer did not show any signs of over pressure. Does anyone have any experience with this type of load? I found an old reloading manual that shows 13.6 of #9 for a semi wade cutter. Does anyone know if there would be a pressure difference from those 2 bullets.  I don't want to get dangerous.  I appreciate your input.

[sqlbullet]

I have in my range book a test of a load of 14.7 grains of #9 under a 175 grain Lee SWC TL, with CCI 300 primers loaded to 1.245" COAL.  These were lubed with Lee Liquid Alox.

Case head measured .432 from the Glock 29 factory barrel, and .429 from the Para Ordnance P16 factory barrel, reamed to 10mm.  Glock 29 average velocity was 1243 with a standard deviation of 16.  It ran 1331 from the 5" Para, with a standard deviation of 6.

No signs of pressure was noted from either gun.  I had no leading in any of the guns with this load.

To be honest, I am not certain you can get enough powder in the case to cause a pressure issue with #9 with a 180 grain bullet.  #9 is just a touch on the slow side for 10mm.  It delivers solid velocity numbers at safe pressure levels, but takes a ton of powder to do so.  I could duplicate this load with Blue Dot using about 1/3 less powder.

[Arizonaman]

Thank you. I just wanted some opinions just to be on the safe side. Like most individuals I don't want to be shooting a .40 if I have a 10mm.

[sqlbullet]

I agree.  You are definitely good. 13.5 is the listed max with a 180 grain JHP.  Your cast WFN is going to offer a shorter bullet than a JHP and less resistance in the bore than a copper jacket.  Your pressure and velocities will therefore be lower.  If you are happy with the performance, then you are done.  If not, you could probably sneak a few more tenths in there for some better velocity.

[The_Shadow]

sqlbullet, provided some great examples and info...I agree with his Blue Dot uses as well.  AA#9 is a good powder but the amount needed for the yield takes away the economical aspects, from a safety standpoint it fills the case.

I am about to test the BE-86 with some of my cast bullets in 10mm and other calibers! 
BE-86 data suggest good yields vs the amount of powder needed, BE-86 is derived from Bullseye, but the burn rate is slower and it has flash suppressants. BE-86 it is similar to Power Pistol which was BE-84 originally.  I see the BE-86 powder to be a great SHTF performance powder...

Best regards!

[Arizonaman]

Thanks guys. I appreciate it. 

[Benchrst]

I put 12.9gr (#9) behind a 175gr (401-175) coated @ 1.245 and chrono'd 1,120.

Really need to revisit that load with mag primers and ladder it up to 13.5

(in a G20 w/ AM 5.15" barrel).

[Arizonaman]

Yeah. I am going to chrono them tomorrow hopefully, if I can get my friend to go out with me. I got good accuracy with 13.5 of the #9. It does feel stout to me but then again just started loading for glock. I have been loading for the delta elite.