K-Tex

You're corect in a manner of speaking. 9mm is the caliber for the 357sig, but 9luger is a different story. This was my mishap as I loaded a 357sig round into a 40s&w. I bounced down the barrel at hit the target at 50 yards. Now I have 1 fireformed 40s&w case.

Comp is a great powder for several cartridges I reload.

I use 3n37 for standard and +p ammo, but 3n38 is supposed too be good?

I use a lot of longshot, hs6 and power pistol for 10mm. Al have been good choices in g20, g40 and xdm (5.25"). Blue dot and #9 has worked well also. Side note: I don't shoot in comps. The bullet load ranges from 135 to 165 and very few 180s.

I was referring too how far the slide moves back before the barrel starts to drop. A short throat on a pistol seems like something went wrong (Apex barrel)? As the other member stated you need too shorten the coal for it too chamber fully. No telling how much you will need too reduce powder charge?

Exactly!

I've never had any reload issues dropping in/plunking. Have you tried doing the same with the factory barrel for comparison? The 1 (apex) barrel I have stays locked longer, but I can't say for sure that distance equates to time?

I didn't notice anything on how the lock time was longer, only how apex said too check length of lock. Glad for the posting of that info!

If you install the factory barrel and slowly push back on the slide then note the distance it moves before the barrel starts too move. With the apex installed the slide moved further rearward before the barrel moved. Shooting there is no way for me too actually feel/know the difference. That is my reference to actually seeing longer lock time. When I have time I'll do some measuring, but will not be able too post pics as for I try to reduce size/pixels for small MB file.

Let me know, because I have 1 like it. I haven't shot any thing heavier than 124gr or in rested when testing for accuracy. I'll try too post for inquiring minds when I have some time? It does stay locked longer than the factory barrel.

I use my children! Why hasn't anyone come up with that!

I have a 10mm and a 40s&w and both are XDM 5.25" that neither have required a lighter spring. I'll check slide weight, but both feel the same weight unloaded.

I like sierra 165v-crown, 150sm and/or speer 155fmj for 40.

If you are using 2 dies (1 for seating and 1 for crimping) then as long as case length is the same it will crimp alike. Bullet weight and/or style will not change your coal.

I guess most on here do comp shooting? Just wondering as for bullet weight choice when meeting power factors? I might need too start another thread, so not too pi$$ off mods/admins? Are these loads in this thread for fmj/cast or do some use hp?

Are you being specific to me? If in regards to me, but not limited to me I'm not posting attitude. If basing it off of punctuation marks it could be read both ways? PM me for further instruction.

I've never bought a barrel and extension separate. I let the other people assemble that part(s). How they correct headspace was never addressed. Still unsolved? For a custom barrel (AR) it's purchased complete with turned gas block journal. Buying a BA barrel and turning it into/converting AR use. ......no thanks. Someone else maybe?

It also doesn't address how headspace is done only which stage of process.

AP 6.5cm barrels have been excellent! Standard rifle length gas system has worked perfect from the get go! I bought a dpms panther 16" for a donor at 450 bucks. Removed the barrel and put an 18" AP 6.5cm barrel on it. Without an adjustable gb it cycled perfect! I have their 18, 20 and 22" barrels in that cal.

HNT26 mdt 26oz

It's not 100% definitive!

Maybe this can help us both? http://ar15barrels.com/making.shtml

You got me? Extensions are sold individually with a hole and maybe a pin, but headspacing one or how it is exactly done? I don't know 100%. Some reason extensions are sold without a barrel. I buy it complete and ready too drop in. I've built over 50 ARs (15s and 10s) and have headspace issues with only 2. Being I had several extra bolts and carriers I solved headspace issue. I have go and no-go gauges for every cartridge I shoot. I don't chance anything I shoot and rely on manufacturers too do their job. Like your statement about extensions are not pinned on the barrel. Good thing they aren't! Getting them off would be terrible! I've never taken 1 apart, so I had no knowledge of if yes or not. I'll try my google fu for an answer or video on process.

Maybe they or could shim between the shoulder and extension, but when an extension only is sold with pin hole drilled then what? How will you headspace and align gas port on a barrel without drilling a new pin hole in the extension?

If a gas port is drilled latter (could be) then burrs would need to be removed from the rifling. Maybe the headspace (like you're saying) extension torque then pinned, gas port drilled. Somehow/way the breach will need too be shaved too get proper headspace (torque extension, check headspace, incorrect headspace, remove extension, shave off .oo2" from barrel, torque extension, check headspace, drill and pin extension, drill port, clean barrel, add to inventory)? Maybe? I have never inquired about procedure. You might be 100% correct!