I own a Caspian 40/10mm single stack which I have invested alot of hard earned money into. I have used shok-buffs in the past with my 45's with no problems. This Caspian is especially tight fitted with Bar-sto barrels and is super accurate in both calibers and respective barrels. The gun was choking on factory ammo especially in 40. I couldnt put 20 rounds through it without a jam. I tried different recoil springs, ammo, magazines, mag springs, followers etc. I was really getting frustrated. Finally I read in an article that Kimber recommends NOT to use shok-buffs in their match 45's(1911s) as they will cause malfunctions. I took out the shok-bufs and WOW! no more jams!Can't believe all the money spent on all that other stuff. Can anyone explain why these shok-buff can cause jams? I think they are a great concept but in this tight fitted gun, they dont seem to work. Anyone else have trouble with shok-buffs?