Just finished working up a load in my G20sf with kkm bbl.
AA#9 at 12.2grs chrono says right at about 1200fps.  No pressure signs on new starline brass.
Bullet is a 200gr badman bullet.  Don't have any measurements on the COL but I seated them to fit the mag.
Start at 11.4grs and work up.

Clos

Thanks guys for all the comments I guess until there's a problem I won't buy a push to die just yet

Thanks for the replies

If I'm using a kkm aftermarket barrel for a Glock 20 3rd gen is it absolutely necessary that I need a push through die  before I full-length resize the brass?

Thanks
Clos

Sqlbullet, thanks for info and welcome.
I have read through the factory pull down list and taken screenshots of data that will be helpful.

Hello everyone!  New member and first post.  Spent about 4hrs reading through the pull downs and other posts.
There is a lot of useful information on this site, still have a lot to read.  I started to load for 10mm about a year ago but then things dropped off and haven't touched it over a year and in that time I bought a 500 Smith & Wesson Magnum and concentrated on that. But now I want to get back to the 10MM load development. I bought a stock length kkm barrel for my Gen 3 G20sf, because of all the bad things I read about the stock bbl unsupported chamber. This gun will be mainly used for a woods gun, I am  looking for top-end loads but not nuclear loads I have AA9, long shot and blue dot. Looking for loading data.

Thanks.
Clos

Hello everyone, new to this fourm.  Hail from the Denver metro area, will be looking into 200gr HC load data for my G20sf.