Mike41 Posted October 26, 2014 Share Posted October 26, 2014 Shooting 180 gr JHP zero bullets with 4.0gr of VV 320 n. Getting some jams (fail to eject, some stove pipe). I have the brown colored recoil spring which I guess is the heavy factory spring , maybe 14 lbs . Can anyone confirm that the brown colored spring is 14 lb? Would changing to a lighter spring help? How much lighter, 13 or 12 lb? How do you change the spring? Thanks, Mike Link to comment Share on other sites More sharing options...
Mike41 Posted October 26, 2014 Author Share Posted October 26, 2014 I have found out it is orange or heavy recoil master. Not sure if this 14lbs or not. Link to comment Share on other sites More sharing options...
Maxximuss Posted October 26, 2014 Share Posted October 26, 2014 I recommend a one piece guide rod vs. the Sti recoil master. There are a couple companies that make springs for it, I run ISMI. I like the 11# and 12.5# spring feel. I do the 11 in minor and 12.5 in major. Link to comment Share on other sites More sharing options...
DougCarden Posted October 26, 2014 Share Posted October 26, 2014 (edited) Run a 10lb spring on a guide rod. Make sure the load will lock back the gun, then add .02 grains more for reliability. If it locks back at 3.8, then keep the 4.0 load. That is some soft shooting..... DougC Edited October 26, 2014 by DougCarden Link to comment Share on other sites More sharing options...
Rob01 Posted October 26, 2014 Share Posted October 26, 2014 One piece guide rod and use a 12# Wolf with my 173-175PF loads and a 10# with the 135PF loads. Link to comment Share on other sites More sharing options...
JMike Posted October 26, 2014 Share Posted October 26, 2014 Shooting 180 gr JHP zero bullets with 4.0gr of VV 320 n. Getting some jams (fail to eject, some stove pipe). I have the brown colored recoil spring which I guess is the heavy factory spring , maybe 14 lbs . Can anyone confirm that the brown colored spring is 14 lb? Would changing to a lighter spring help? How much lighter, 13 or 12 lb? How do you change the spring? Thanks, Mike What OAL are you loading too? Is it s new to you gun? Does it do it with full power loads? Link to comment Share on other sites More sharing options...
Mike41 Posted October 27, 2014 Author Share Posted October 27, 2014 JMike, OAL - 1.19. I only shot about 50~100 rds at 4.8gr of 320n when it was new. It had a few jams but I was reloading some bulged glock brass that may have been the cause. Switched to new Starline brass and reduced the powder amount. Recoil is much better and very controlable for me, like a .22. I have a single jam on about every other stage (1 per 30rds or so). Gentlemen, is there anyway to get the recoilmaster system to work with .40 minor loads? Or will changing springs be a waste due to the potential of the system breaking later? If I change to a guide rod, which one to get? I have heard tungston, then steel, one with a screw in it? Is there a particular model to get that is tried and proven out in competition? Do you get one from Brownell's, Springfield, or a certain one from Dawson? Thanks for everyone's help. Just need a few more details before spending any money so I know which way to go. Mike Link to comment Share on other sites More sharing options...
Lifeislarge Posted October 27, 2014 Share Posted October 27, 2014 All I know is that most people unass the recoil master guide rods when they get an STI for competition. Anyone of the builders can supply you with one whether it be Dawson, Brazos, Akai, FGW, Cheely, etc. Shooters Connection would also be a good source. You need to easily be able to change out your recoil spring with common replacements in order to customize the action for whatever load you might be developing. Plus Wolf springs are pretty cheap and plentiful versus anything for a recoil master. Link to comment Share on other sites More sharing options...
Rob01 Posted October 27, 2014 Share Posted October 27, 2014 I load mine in the 1.140" range so I can use them in my Glock as well. They feed fine in my Eagle and Trojan. Link to comment Share on other sites More sharing options...
Jimmy76 Posted October 27, 2014 Share Posted October 27, 2014 My .40 minor load consists of loading a 140 grain bullet instead of a 180 grain bullet. Stock Edge with recoilmaster. Hope this helps. Link to comment Share on other sites More sharing options...
SilverBolt Posted October 28, 2014 Share Posted October 28, 2014 I too use a 12lb spring for major and a 10lb for minor. Link to comment Share on other sites More sharing options...
Mike41 Posted October 28, 2014 Author Share Posted October 28, 2014 Has anybody had issues with using light springs with slides cracking? STI advised of this concern. Mike Link to comment Share on other sites More sharing options...
kcobean Posted October 28, 2014 Share Posted October 28, 2014 You want to shoot a soft round that's reliable with a tool-less guide rod and a 12 lb spring? Try 3.7-3.8 grains of N320 under a 200 grain Bayou. My STI loved that load, it cycled perfectly and man was it soft. Link to comment Share on other sites More sharing options...
davsco Posted October 28, 2014 Share Posted October 28, 2014 10# spring on one piece guide rod worked for me with atlanta arms 180g minor ammo. almost felt softer than my similar gun in 9mm. Link to comment Share on other sites More sharing options...
Mike41 Posted November 3, 2014 Author Share Posted November 3, 2014 How do you know if you needed a shok buff or not? Does each spring weight have a majic power factor that once you go above you need a shok buff? How many of you that use a 10lb spring also use shok buff? What PF are you shooting ? Thanks, Mike Link to comment Share on other sites More sharing options...
wgj3 Posted November 3, 2014 Share Posted November 3, 2014 (edited) Shooting over major loads with a light recoil spring can lead to premature wear, but with the minor loads, you should be fine. Shok buffs are not a universally accepted item. They change the length of the recoil/slide cycle and can negatively affect function. That said, I run a 6" .40 and use a 12lb recoil spring on a tungsten guiderod for major and minor. I also run a thin aluminum shok buff over a polymer one to change recoil feel, shorten the recoil cycle and cushion the frame a little. ETA - minor ammo around 130-135PF; major at 165-170PF... Edited November 3, 2014 by wgj3 Link to comment Share on other sites More sharing options...
jwhittin Posted November 5, 2014 Share Posted November 5, 2014 major at 165-170 PF. Careful there unless u don't mind shooting open. I recommend adding 2 to 2.5 times your std to the required PF velocity. This puts u at about 170 to 175 PF and very little chance of going minor. Link to comment Share on other sites More sharing options...
andy27al Posted November 5, 2014 Share Posted November 5, 2014 Definitely swap to FLGR and a lower spring weight of your choosing. You can buy a few spring weights and test them to see which feels best and runs best with your setup Link to comment Share on other sites More sharing options...
Mike41 Posted November 5, 2014 Author Share Posted November 5, 2014 How do you know when a shok buff is necessary? For example. If I am shooting 150 PF with a 10 or 11lb recoil spring would I need it or not? Mike Link to comment Share on other sites More sharing options...
Mike41 Posted November 9, 2014 Author Share Posted November 9, 2014 Installed a 11 lb spring with the Dawson tool less guide rod, no problems in match today. Just curious if I need the shok buff or not. Would guess I shooting 140-150 PF. Mike Link to comment Share on other sites More sharing options...
Dr Mitch Posted November 9, 2014 Share Posted November 9, 2014 How do you know when a shok buff is necessary? Mike Never. Link to comment Share on other sites More sharing options...
Iceman2733 Posted November 9, 2014 Share Posted November 9, 2014 You can run a shock buff no matter what PF or spring combo you are running, I run them in all of my guns open and limited. Link to comment Share on other sites More sharing options...
Mike41 Posted November 9, 2014 Author Share Posted November 9, 2014 Iceman, Yes, but when do you need it to protect the slide from cracking vs optional per Shooter's preference ? Mike Link to comment Share on other sites More sharing options...
Lifeislarge Posted November 9, 2014 Share Posted November 9, 2014 Typically when you're running a light spring with a major load. Link to comment Share on other sites More sharing options...
ivan Posted November 10, 2014 Share Posted November 10, 2014 shok buffs: you mileage may vary. Some guns will run them ad infinitum. Some guns will chew through them in 100 rounds. Keep an eye on them if your gun hasn't used them before. -ivan- Link to comment Share on other sites More sharing options...
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