Teamsterjohn Posted February 12 Share Posted February 12 I’m showing factory loads out of my 40 cal STI/ McCormick gun. What weight spring would be best for me. Thanks Quote Link to post Share on other sites
RVRSE Posted February 23 Share Posted February 23 On 2/12/2021 at 4:39 PM, Teamsterjohn said: I’m showing factory loads out of my 40 cal STI/ McCormick gun. What weight spring would be best for me. Thanks How fast are the factory rounds moving? I'm shooting 180gr at ~950fps and using a 12# spring with my 2011. Quote Link to post Share on other sites
Ozy Posted Saturday at 11:33 PM Share Posted Saturday at 11:33 PM I’m using a 10# with PD ammo. Quote Link to post Share on other sites
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