congrats on the 3..no breakin necessary on mine.. i wore one out at the range ..
i knew with that rnd i had to be able to hit specific vitals..kel tec sent me a new one
with old # stamped in it..
i m not an advocate of center mass aim point with that gun..if a deer can run 100 yrds with
a 180 grn 06 rnd thru its lungs.. [an sometimes they do] ..well i just think its possible you just make some people mad with a one lung shot..self defence is about stopping all aggression..
upper chest where every thing ,wiring etc comes togather..neck an face shot are my bet to stop him faster..
still thats just my bet..also jmo.. good luck ..slim