K40 troubleshooting, fixed, runs great now thanks

[AFCop]

The stainless K40 performance has improved. I have been tuning and polishing parts in an attempt to resolve a coulple of issues.

During the last 50 round test fire:

One jam, the round became wedged between the feed ramp and the breech face with the rear of the case tilted upward.

(I have polished the feed ramp)

Three or four return to battery without stripping a round.

(Removed the magazine catch and polished the bevel, sanded and polished the magazine followers so they pass the mag catch smooth when a disassembled mag is inserted in the mag well.)

Three or four premature slide lock.

(Sanded and polished the slide stop lever so rounds rising in the magazine are less likely to bump it and engage the lock.)

New springs are on order. I will let you know how the next fifty rounds goes. I wont give up on this Kahr as I love it so. I am commited to seeing it through until it is dependable. Thank you all for your advice and input.

[AFCop]

Shot another 50 rounds after sanding and polishing feed ramp, mag followers and internal slide stop lever. Experienced less malfunctions. I am starting to think the gun doesnt like the shape of the bullet on my duty ammo.

Had one slide lock with rounds in the magazine.

Two rounds wedged between feed ramp and breech face.

One round jammed between the top of the barrel and the breech face.

One incident of going full into battery without stripping a round.
(Not sure what is causing this or how to fix it)

One fail to lock back on empty magazine. (probably because of my slide stop modification) Will attempt to post pictures from photobucket.

I will try to find some ammo with a bullet that is not as blunt as this Federal 180 JHP and see how it performs. Sure would like to shoot this round as I have better access to it.

This is the ammo I am breaking the pistol in with and the ammo I would like to use for every day carry.

[AFCop]

It running good now.

Replaced the slide stop with a free factory provided new slide stop.

Replaced the recoil spring and the magazine springs.

No jams, no premature slide lock, no failure to strip a round.

All of the problems were solved with new springs. The new magazine springs were about three times as long as the old (set) mag springs. I broke a sweat trying to cram all that coiled steel into those little mags.

I think the weak mag springs were allowing the rounds inside the mag to ride forward and engage the slide lock lever on thier way up.

Thanks for all your help.

So all is well, I have been meaning to ask you other K40 owners. Does your slide stop hole have a notch cut in the top near the slide stop spring inside the frame like this?