JohnP71 Posted October 8, 2018 Share Posted October 8, 2018 I just wanted to get a consensus on the proper or happy medium spring rate for 150 gr Syntech ammo in a P320 X5. Link to comment Share on other sites More sharing options...
021411 Posted October 18, 2018 Share Posted October 18, 2018 Hope you found your answer within the last 10 days but if not 10# is what I settled on shooting 147gr at 135 power factor in my P320 X5. The 150gr Syntech is advertised as 130 PF based on their published velocity. Either way try it out. With that said, I think you'll be fine in the 10-13# range. Link to comment Share on other sites More sharing options...
OPENB Posted October 20, 2018 Share Posted October 20, 2018 I like the 12.5# ISMI 1911 spring on a Springer guide rod. Ive tried the 10#, and it worked ok too. Link to comment Share on other sites More sharing options...
BillGarlandJr Posted October 22, 2018 Share Posted October 22, 2018 On 10/20/2018 at 6:00 AM, OPENB said: I like the 12.5# ISMI 1911 spring on a Springer guide rod. Ive tried the 10#, and it worked ok too. 12.5 ISMI is what I run with 124gr loads at about 135pf these days. Works very well for me. Link to comment Share on other sites More sharing options...
CZ173 Posted January 10, 2019 Share Posted January 10, 2019 What is the factory spring rate so that I can start there and work my way down?Sent from my LM-V405 using Tapatalk Link to comment Share on other sites More sharing options...
George16 Posted January 10, 2019 Share Posted January 10, 2019 1 hour ago, CZ173 said: What is the factory spring rate so that I can start there and work my way down? Sent from my LM-V405 using Tapatalk 18 # according to Sig. I’m using a 10# 1911 spring with a springer precision guide rod on mine shooting 124 Gr PD JHP @ 126-128 pf. Link to comment Share on other sites More sharing options...
beta1759 Posted January 10, 2019 Share Posted January 10, 2019 springs are cheap. buy a bunch of different weights and test them out. Link to comment Share on other sites More sharing options...
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