Shot looks bad but wasn't

I took this one with my Prod this morning. It is shooting copper plated H&N FTT pellets about 750 fps at the muzzle. The squirrel was only about 10 yards away so I like the low scope of the Prod. It dropped immediately but when I picked it up and saw the guts hanging out I got a little worried about my placement. The pelleted entered behind the diaphragm but went forward stopping under the skin on top of the off side shoulder. It broke the shoulder on the way past. So right through the lungs and may have hit the heart. Good shot, not a lousy gut shot.

17 ounce male.

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I have a stiffer .042 wire hammer spring in it but that is more the b Staley o rings. Mainly I turned up the hammer spring and drilled the transfer port out to .111 inches (stock is .080). I could get to 20 fpe but the shot count was so low I settled on 18 or so. I get 20 full power shots from a 3000 fill and finishing the third magazine is possible without much drop-off. Around the house I often fill to more like 2700 to flatten the early velocity.
 
I have a stiffer .042 wire hammer spring in it but that is more the b Staley o rings. Mainly I turned up the hammer spring and drilled the transfer port out to .111 inches (stock is .080). I could get to 20 fpe but the shot count was so low I settled on 18 or so. I get 20 full power shots from a 3000 fill and finishing the third magazine is possible without much drop-off. Around the house I often fill to more like 2700 to flatten the early velocity.
Thanks I’m running a very similar set up on mine. 0.42 Spring w/ .125 TP(5 3/16 HS + 1 5/8 HT) Well I was, I just removed my x rings for the B Staley. I’m going to experiment with a lightweight hammer next. I was getting pretty good strings but bsm was very temperature or humidity sensitive. On a cold day it would drop 35-40fps