KKM Barrel

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I posted somewhere else my experience with the KKM 10mm barrel.  I got the 5 inch threaded for Lone Wolf Suppressor.  It is great and after 3 years I have no complaints at all.  ONE THING; however, make sure you tell KKM that you intend on using the HEAVY ammo (from UNDERWOOD - there the best IMHO, Buffalo Bore or Double Tap),  I had to send mine back as it gave me several FTF (failure to Feed), called them up,and they said " we have to re-size-modify the bullet chamber for people that use the heavy loads".  You figure that anyone that would by a $300.00 barrel would be using the GOOD AMMO, whatever!!!  Once I got the barrel back, it NEVER "FTF" again, EVER.  I loved it, (LOVE IT) especially when I use the Lone Wolf Muzzel Brake; when combined with the DPM Recoil Reduction System (Triple Spring system), the recoil is just about the same as a +P+ 9mm round.  The DPM really made a difference.  Here is DPM's Link:
https://dpmsystems.com/en/

My experience with the KKM is similar. I've been able to handload DoubleTap's 200 grain WFNGCs and Beartooth's 200 grain WFNGCs without having to send my barrel back to KKM. I just had to seat the bullets to 1.250 for proper feeding. Any longer than that and I couldn't load a Glock magazine with more than 10 rounds before they bound up the magazine and they wouldn't feed reliably. I also had to make sure I crimped them sufficiently to fit in the chamber. It will be obvious if they are not properly crimped if you do the drop or plunk test and drop a loaded round into your chamber. It's easy to see if it drops fully into the chamberl or not. I'll be loading some Montana Bullet Works 200 grain WFNGCs in a month or so as well.