midvalleyshooter Posted September 9, 2004 Share Posted September 9, 2004 I am going to order some ISMI flat recoil springs for my G34. I am loading 147's for a 135 power factor. I may also try some lighter bullets/loads for steel matches, any suggestions on recoil spring poundage? Thanks, Keith Link to comment Share on other sites More sharing options...
Thomas Moore Posted September 9, 2004 Share Posted September 9, 2004 i use an 11lb spring with my 115's Link to comment Share on other sites More sharing options...
chp5 Posted September 9, 2004 Share Posted September 9, 2004 I think the lightest spring ISMI makes is a 13 lbs spring. I use that one in my Limited G22 .40, with two coils cut off. I use the same spring in my G34 as well. Link to comment Share on other sites More sharing options...
Flexmoney Posted September 9, 2004 Share Posted September 9, 2004 I use the stock spring. Don't order you ISMI Glock recoil spring from Brownells. Link to comment Share on other sites More sharing options...
Precision40 Posted September 9, 2004 Share Posted September 9, 2004 I use an ISMI 13lb minus 3 coils. At 130pf, the stock spring would give me quite a few failure to feeds, so I had to drop it down to 13lbs and cut 3 coils. 100% reliablility. Link to comment Share on other sites More sharing options...
robomanusa Posted September 9, 2004 Share Posted September 9, 2004 I use the ismi 13lb spring in my G34. Flexmoney is correct, do not order the 13lb ismi springs from brownells, they are a bad batch and brownells isnt telling anyone about it. The 15lb springs they are selling are fine though. Ive never had good luck with anything lighter than 13lb or cutting coils off of the springs, just make sure the slide will fully return to battery while cycling. Another thing to look for is that while squeezing the trigger, the slide does not move back out of battery. Link to comment Share on other sites More sharing options...
Custom Glock Racing Posted September 9, 2004 Share Posted September 9, 2004 I start with a 13 and adjust to the load. All the info is in the spring wars article at www.custm-glock.com/glocktech.html Link to comment Share on other sites More sharing options...
Harmon Posted September 9, 2004 Share Posted September 9, 2004 ill second the stock spring...i have fiddled with spring weights, practice pays off alot more than a spring swap. my 34 with stock spring runs fine all the way down to 125 pf loads...so in a 9mm i dont see a need for lighter springs. IMO Link to comment Share on other sites More sharing options...
Duane Thomas Posted September 10, 2004 Share Posted September 10, 2004 I use the ISMI 13-pound spring with 130 pf loads. I've never cut any coils and never had a problem. Link to comment Share on other sites More sharing options...
MoNsTeR Posted September 10, 2004 Share Posted September 10, 2004 13lb ISMI with poofy 147's. The stock spring is ok (and works fine with my load) but the 13 is much nicer. Link to comment Share on other sites More sharing options...
Duane Thomas Posted September 11, 2004 Share Posted September 11, 2004 13lb ISMI with poofy 147's. The stock spring is ok (and works fine with my load) but the 13 is much nicer. That's pretty much it. Link to comment Share on other sites More sharing options...
midvalleyshooter Posted September 11, 2004 Author Share Posted September 11, 2004 Thanks to all, I will blow the dust off of the 1050 this weekend and load some poofy 147's. I will try out the G34 next weekend after I pick it up from my FFL. If it runs I will wait on the springs if not I will get the 13 lb ISMI, and clip coils if needed. I have found sometimes stock springs are best. In the Ruger single actions taking 5 coils off of the stock hammer spring gives you a lighter cocking action but you still get solid ignition. This bit of info came from the SASS forum by way of a Ruger employee who ran the tests. This is an example of the value of forums and the folks that post here. thanks again folks. By the way I bought this G34 used from Millard of sportshooter.com fame. He's a stand up guy to deal with. Keith Link to comment Share on other sites More sharing options...
Joe D Posted September 12, 2004 Share Posted September 12, 2004 Why do you say the springs are defective at Brownells? I have been dealing with them for 30 years and find them to be the most honest and shooter friendly company I have ever dealt with. I have several 13# springs that I have bought from Brownells recently. Not a problem with any of them. Link to comment Share on other sites More sharing options...
Steve Moneypenny Posted September 12, 2004 Share Posted September 12, 2004 Basically ISMI had a bad run of their 13 pound springs, others are fine. a bad run doesn't mean ALL of them are bad, just some of them usually. Since there was probabally no overwhelming evidence that the springs were defective Brownells didn't pull them. Link to comment Share on other sites More sharing options...
hdgun Posted September 13, 2004 Share Posted September 13, 2004 What exactly is the problem with the springs from Brownell? Are they too light, too heavy, what are the symptems of a so called bad spring? Link to comment Share on other sites More sharing options...
robomanusa Posted September 13, 2004 Share Posted September 13, 2004 What exactly is the problem with the springs from Brownell? Are they too light, too heavy, what are the symptems of a so called bad spring? The spring OD's are several thousandths oversize which causes them to bind inside the spring tunnel and you do not get full slide travel because of the binding. I have 2 of these springs myself from brownells. I called Marc at ismi with my problem and he sent me some replacements and told me all about the deal with the springs....Actually the problem arose from glock changing the inside diameter of the spring tunnel on there pistols. So it's really not an ismi problem, it's just that brownells has a run of springs that dont work with the changes glock has made to there pistols. The springs from brownells should work fine on the older glocks, though I am not sure when glock made the dimensional changes and Marc didnt actually know either. If you have a spring problem call Marc, he is a super nice guy and great to talk to, I am sure he could answer any spring questions you might have. Link to comment Share on other sites More sharing options...
TRG65 Posted September 28, 2004 Share Posted September 28, 2004 I've been using a cut down 13# ISMI purchased beginning of this year from Marc. I had to trim 6 coils to get full slide travel. This bothered me so I installed a shock buff for a little protection of the frame. If it works in a 1911 and we pretty much all use them in 1911's I figured it should work in my Glock. Since I never clean my Glock and then switched guns after the Ohio IDPA match, I only recently got around to taking the Glock apart for cleaning. Both sides of the shock buff were "cut" off, from frame slide contact. The buff endured at most 15 IDPA matches, and I never have time to practice, so it was probably a max of 1500 rounds. Previously, I've run shock buffs with stock Glock springs and the buffs have never shown the least bit of wear. Just an FYI for all the light spring shooters. Not that I'm not going to switch back to shooting the stock spring, but I am definately going to keep a buff in any light spring glock. Also, I don't shoot hot, snappy, loads. I'm using a 147 at about 900 fps (132-133 pf). Link to comment Share on other sites More sharing options...
jspruance Posted September 22, 2005 Share Posted September 22, 2005 I ordered a 13# recoil spring from Brownells not realizing there was a problem. The spring feels good with 115 gr/ 135 PF loads. However about one in fifty rounds the gun fails to go fully into battery, lacks about 1/4". I see posts about chopping coils off of the 13# springs. Does this have something to do with fixing this particular problem? By the way, the gun is a G34. Thanks, Link to comment Share on other sites More sharing options...
Flexmoney Posted September 22, 2005 Share Posted September 22, 2005 JS, You are likely getting spring bind because the inside diameter of the spring is binding on the rod...or, the outside diameter is binding in the spring tunnel of the glock. I forget which. Regardless, cutting coils off the length won't change the diameter. The problem will still be there. I'd get that spring/rod combo out of the gun before it jams (good malfunction) or it closes the slide just enought to allow the gun to fire out of battery (bad malfunction). Call ISMI...they will work to get you squared away with the proper (not-from-Brownell's supply) spring. Link to comment Share on other sites More sharing options...
norbs007 Posted September 22, 2005 Share Posted September 22, 2005 I think the lightest spring ISMI makes is a 13 lbs spring. I use that one in my Limited G22 .40, with two coils cut off. I use the same spring in my G34 as well. <{POST_SNAPBACK}> I got my 11lb ISMI spring from Custom Glock Racing, which I use for my G22 shooting minor loads. Link to comment Share on other sites More sharing options...
SRT Driver Posted September 23, 2005 Share Posted September 23, 2005 I had the same issue with a 13 lb ISMI from Brownells. Had to cut 4 coils to get full slide travel. I've been running a 15lb ISMI in a G34 with 138pf 125gr bullets and it dropped right in. With this load, the 15 returns better than the 13, IMHO. Link to comment Share on other sites More sharing options...
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