sasquatch981 Posted September 24, 2011 Share Posted September 24, 2011 I have 17lb mainsprings in my other (2) pistols but they are both .40's. What is the lightest spring you can use in a .45 and still have 100% reliabilty? I just bought a new SA TRP and the trigger is nice, but comes in at 5.5lbs. I would like to get it down to ~3-lbs. I know that I can monkey with the sear spring, but the Main-spring has to be part as well. I am hoping a drop to 17-18lbs will allow reliabilty and a slightly decreased weight as well. What about a titanium cap, and strut? Will that help with weight, or just lock time and "cool-factor"? Link to comment Share on other sites More sharing options...
CSEMARTIN Posted September 24, 2011 Share Posted September 24, 2011 When I tried to run a 17# spring, I had light strikes. Now, I run only 19# mainsprings and have never had a problem. My trigger is 2.5#'s and is 100% reliable. I had a gun with titanium parts, but I didn't notice a difference. Link to comment Share on other sites More sharing options...
EkuJustice Posted September 24, 2011 Share Posted September 24, 2011 From What I have seen the MS is minimal. My smith did one on my 9mm 1911 that is sub 2 pounds with a 19pound MS Link to comment Share on other sites More sharing options...
fastarget Posted September 24, 2011 Share Posted September 24, 2011 your gun probably came from the factory with a 19, a change to 18 or a 17 could change the trigger by a few ounces (4-6), I run 18 in mine......combine that with a little adj to the sear spring could get it down in the 3s, but to get it real light a good gunsmith to change the sear/hammer angles. Link to comment Share on other sites More sharing options...
rcc96 Posted September 24, 2011 Share Posted September 24, 2011 15lbs ISMI no problems... Link to comment Share on other sites More sharing options...
ParaGunner Posted September 24, 2011 Share Posted September 24, 2011 Going from a 23lbs to a 17lbs mainspring will only drop the trigger pull weight a quarter of a pound. Try a Infinity tri-glide sear spring ,it's a cheap way to get your pull where you want it. You will need to tune the spring though. Link to comment Share on other sites More sharing options...
2MoreChains Posted September 25, 2011 Share Posted September 25, 2011 I tried a 17 lb MS a few years ago but ditched it because I was getting light strikes. Went with an 18 lb spring, and haven't had a problem since. I now use 18 lb mainsprings in all of my 1911's and 2011. Mostly use Winchester or CCI primers. Link to comment Share on other sites More sharing options...
soaringf22 Posted September 25, 2011 Share Posted September 25, 2011 i use a 17lb mainspring in both .45s but also use an extra power firing pin spring. it sets off from federals to cci's to wolf primers. Link to comment Share on other sites More sharing options...
TonyT Posted September 25, 2011 Share Posted September 25, 2011 I have 17lb mainsprings in my other (2) pistols but they are both .40's. What is the lightest spring you can use in a .45 and still have 100% reliabilty? I just bought a new SA TRP and the trigger is nice, but comes in at 5.5lbs. I would like to get it down to ~3-lbs. I know that I can monkey with the sear spring, but the Main-spring has to be part as well. I am hoping a drop to 17-18lbs will allow reliabilty and a slightly decreased weight as well. What about a titanium cap, and strut? Will that help with weight, or just lock time and "cool-factor"? A lot depends on the load you use. A friend shoots steel challenge using a Colt NM in 45ACP loaded with 3.5 gr. YTrail Boss and a 230 gr. lead bullet - you can almost see the bullet bgoing downrange. He uses a 10 lb. recoil spring for reliable function. Link to comment Share on other sites More sharing options...
warpspeed Posted September 25, 2011 Share Posted September 25, 2011 I have run a 17# MS with a XL firing pin and have never worried about the gun not going bang. Link to comment Share on other sites More sharing options...
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