ACME Bullets 200g FP-COATED Load Data?

[Bigboi10mm]

Weapons used will be stock Glock 29, Glock 20 with a long slide and 6.5 barrel and a 8.5? AR pistol.

Was wondering if anyone had any good reliable load data for this round? I have seen a lot of people talking about 11-12.6 of Accurate no.9 and large pistol primers while using other companies 200gr LCFP projectiles but not sure of COL with this. Just wanted to see what was out there.

[sqlbullet]

I can't speak to your specific bullet.  Probably not gonna fined this kinda specific data.

Here is my process:

I just use 200 grain data.  I load to 1.260" and reduce only if I have to in order to get reliable feeding. (Which means if I want it to run in my 1911 10mm's I have to keep it to 1.250")

Lead and coated bullets will reach pressure with a slightly (2-3%) lower charge than a jacketed bullet.  This is because lead/coated bullets seal the bore better than copper jackets. If I am sourcing copper jacketed data I would reduce the max charge .2-.3 grains, or I would check velocity with a chronograph and stop when I hit max velocity.

If the #9 is pre-2016 I would use 13.0 grains as a max as that aligns with the older data (13.5 grains for 1200 fps).  Post 2016 the data is 12.5 for 1170 fps, so I would stop at 12.2 grains or test with a chronograph.

[Bigboi10mm]

Ok thank you for the help and input. Do you know if the 1.260? COL works in Glocks?

[The_Shadow]

1.2600" does work with many bullets from the Glocks.  Nose geometry can sometimes be an issue as they are feeding.  0.300" MEPLAT if it is somewhat rounded edges will work.
Wide Flat Nose with MEPLAT of 0.320" - 0.330" may require a shorter COL at about 1.2450"

[Bigboi10mm]

Thank you sir!!

[John A.]

1.2600" does work with many bullets from the Glocks.  Nose geometry can sometimes be an issue as they are feeding.  0.300" MEPLAT if it is somewhat rounded edges will work.
Wide Flat Nose with MEPLAT of 0.320" - 0.330" may require a shorter COL at about 1.2450"

Yeah, I've considered shortening a a wide nose down a little so it doesn't hang up in the front of the chamber where the case headspaces against, so it's good to know that may be one possible "fix" for a finicky eater.  I've been trying to work through that in my head so I'm glad to know that I wasn't too far out in left field in my thoughts.

Granted, depending on the charge, something that fills the case up a lot, I would likely back off some of the powder too so nothing is compressed and gets spikey and goes from mild to wild rather quickly.

So far, 1.255" has been productive with 155 gr and 180 gr armscor bullets that I have tried in my gun so far, but it's not a glock.  So, I apologize if my comment adds little to the discussion.