She is a beauty---Just added a Test

Smith and Wesson Performance Center Model 41 with a Aimpoint H2 2 MOA Dot.

Every Momma thinks their daughter is beautiful.

Ha Ha That's my baby. Now if she only listens and hits the bull eyes I will be happy. lol

Congrats!  She is a beauty!

I agree - she is a Beaut'!

Is this the same one which was giving you fits previously?  Does it run well now?  you didn't post what the resolution ended up being.

smsnyder wrote:My new from the factory custom shop model 41 pistol is a nightmare. Failure to feed, Failure to eject, Stove Piping. Failure to fire twice. 

Disappointed

Sand Bag shooting. Ok, I  tried CCI Standard Velocity 40 grain with factory spring and 8 pound Clark spring with buffer. Out of 100 rounds the CCI standard velocity ammo stove piped 15 times and failure to feed twice..  Different spring did not matter. Now I used the 100 CCI Select Competition 40 grain ammo using the Clark 8 pound spring with the buffer. Not only was it  (more accurate ), I had no stove pipes or failure to feed issues. It was 34 degrees at the range and my fingers were frozen. Great results in this condition.

5 shot group at 25 yards. The group is about 3/4 inch. I just need to adjust point of impact a little more.

The Aimpoint H2 red dot was extremely clear. I did notice on lower settings it was to small to pick up against a white background. I had to turn the dot up a little more.

I'd send it to S&W and have them look it over.  It should function with standard velocity rounds.   It's interesting that 1200 fps is more accurate than 1070 fps at 25 yds.  Everyone I know shoots SV in their 22 target pistols and rifles.

I tried a ton of ammo. Eley,Remington, Winchester etc. This CCI Select ammo is the most accurate so far.

It's also more expensive ammo.

The standard spring is 7.5 lbs and that would be the starting point for shooting SV ammo.  What problem caused you to go up to an 8 lb spring?  Your test proves that there is a direct relationship between the strength of the recoil spring and the needed power to cycle the slide.  A buffer will possibly slightly retard the slide travel too as the spring can reach stacking sooner.   Both the higher spring rate and the buffer have a direct correlation with needing hotter ammo.  Clark doesn't make springs, those are Wolff, which have an open end and a closed end, closed end goes towards the muzzle. 

With a non SW spring you should also check that the spring doesn't have a sharp edge which is scraping on the recoil guide rod.

Try the experiment exactly the same with the OEM 7.5 lb spring, warmer conditions and no buffer.  Cold weather robs energy from the round, thickens oil/grease and causes tighter tolerances.  Your failure rate should go down with those three changes. 

I hope you don't take this the wrong way but were you running the stiffer spring and buffer before when you were having all the failures?

Nothing upsets me more that constant failures to extract or stove pipes. It's really a pain when your in competition.

The Smith factory spring does does no extract the CCI standard velocity ammo. I tried all kinds of ammo with the factory spring and I get constant failure to extract, stove pipes etc.

I went to a little heavier woff spring so it would feed and extract better and stop stove piping. Combine the stronger spring and a little hotter CCI competition load and it works 100% so far.

OK, that info is really helpful.  

Pardon my candor, but you are chasing the wrong issue.   Changing recoil springs does nothing to change extraction.   Extraction is related to chamber dimensions, chamber cleanliness, and extractor hook tuning.  Usually the extractor has the least impact as the empty case should work like a piston on the slide.  Based on what you just posted, your chamber is either dirty or undersized and the higher velocity rounds can force themselves out of the chamber where lower power can't force themselves out with sufficient velocity.

Think of it this way, the slide can not move if the empty case is welded into the chamber.  Therefore, since the slide moves, the case (piston) is moving the slide and compressing the recoil spring, just not with sufficient energy for the case to hit the ejector with enough force to remove the spent case.  To increase the velocity with SV you would drop the spring rate, not raise it.

Tuning should be at a better temperature, like at an indoor range.

I am having more stove piping with CCI standard velocity loads. Failure to feed only happens once in a while. 80% failure to extract/stove pipong with factory spring.

I tried to oil the first round. I tried different magazines. The smith with a factory spring does not like CCI standard velocity ammo. I clean all my pistols after use.

I see Clark /woff makes a 6 and a 6 1/2 pound spring. Might try that with CCI standard velocity loads.

Talked to clark custom. They suggest getting the 6 pound spring for standard velocity ammo.