rmills Posted May 7, 2005 Share Posted May 7, 2005 In regards to single stack .40's we are all well aware of the various issues that have prevented this combination from becoming popular. The main issue of which being the feedramp geometry. More times than not the bullet tends to nosedive into the bottom of the feed ramp. I experienced this on a Springfield "Loaded" model albeit with the first round I attempted to chamber. After the first round was in, feed problems occurred infrequently during actual firing. But they did happen at the worst times (i.e. in the middle of a stage). In looking at most .40S&W singlestacks, the feedramp geometry is identical to the .45ACP models. The .45ACP having a larger radius tends to work well with the current feedramp designs on the market today. In looking at aftermarket barrels such as Schuemann, do their feedramp designs vary per caliber? Do the current mainstream manufacturers, whether they buy barrels or produce them, use the same feedramp design regardless of caliber? Virgil Tripp has been modifying feedramps on .40S&W STI Trojans to make them more reliable. What is the key to a reliable singlestack .40S&W in regards to the barrel? Is it the general consensus that the barrel ramp geometry is the number one issue plaguing the singlestack .40's? Link to comment Share on other sites More sharing options...
ChuckS Posted May 7, 2005 Share Posted May 7, 2005 Rmills, I will let the gunsmiths reply on the geometry of the .40 1911-based guns. One common thing that is done is to load the rounds longer. Where the factory OAL max is 1.135" for .40 S&W, a lot of shooters use 1.175 to 1.200". The longer rounds have be said to aid reliability in feeding and mag function. Later, Chuck Link to comment Share on other sites More sharing options...
Rising Sight Posted May 7, 2005 Share Posted May 7, 2005 I talked with Virgil Tripp and he told me that it has to do with the feedramp geometry. That seems to be the biggest concern with the feed problems that exist with a .40 single stack. Link to comment Share on other sites More sharing options...
Flexmoney Posted May 7, 2005 Share Posted May 7, 2005 Roy, One of our Ohio shooters (a multi-gun IDPA Master) has a Kimber in 40 that runs and runs. I don't recall any details, it may be a custom built gun. I do know he loads a little longer than stock. Link to comment Share on other sites More sharing options...
Rising Sight Posted May 7, 2005 Share Posted May 7, 2005 I load mine alot shorter now. I used to load them at 1.200 then I bought my son an XD40 and his mags didn't work with the long length. I load everything at 1.135 now and both my Trojan and the XD run great. Link to comment Share on other sites More sharing options...
rmills Posted May 7, 2005 Author Share Posted May 7, 2005 When I was shooting .40S&W STI and SVI Limted guns, I too loaded long. It was not due to feeding issues as the mag/barrel geometry in those pistols was correct. I loaded long due to using a 200 grain bullets and attempting to keep the pressure down. I found that with my Springfield .40 singlestack, loading long didn't really make much of a difference in regards to the nose dive problem especially on the first round. Does Virgil Tripp extend the barrel ramp by welding on new material and then machining a new ramp profile? Does this also require modification to the ramp cut in the frame? Link to comment Share on other sites More sharing options...
G+16 Posted May 7, 2005 Share Posted May 7, 2005 this is a dumb question, But would a ramped barrel in 40 S&W cure this problem? Link to comment Share on other sites More sharing options...
rmills Posted May 7, 2005 Author Share Posted May 7, 2005 this is a dumb question, But would a ramped barrel in 40 S&W cure this problem? <{POST_SNAPBACK}> We are talking about .40's with a ramped barrel. Very few non-ramped .40 barrel'ed single stacks were made due to the issue of poor case support. Link to comment Share on other sites More sharing options...
G+16 Posted May 7, 2005 Share Posted May 7, 2005 well I said it was a dumb question Link to comment Share on other sites More sharing options...
texasag93 Posted May 7, 2005 Share Posted May 7, 2005 It works in Paras and S_I's, I don't get what the problem is with a single stack? I single stack mag would seem to aid in reliabilty!? Dumb statement, but my observation. TXAG Link to comment Share on other sites More sharing options...
Joe D Posted May 8, 2005 Share Posted May 8, 2005 I never had any feed issues with my .40 Kimber. I did load to a 1.200" OAL. I used Wilson, Ed Brown or McCormick 10 rd .45ACP mags. Link to comment Share on other sites More sharing options...
Flexmoney Posted May 9, 2005 Share Posted May 9, 2005 JoeD, thanks for reminding me. I'm I pretty sure the Kimber 40 shooter that I was talking about uses Wilson 45 mags. Link to comment Share on other sites More sharing options...
Rising Sight Posted May 9, 2005 Share Posted May 9, 2005 Does Virgil Tripp extend the barrel ramp by welding on new material and then machining a new ramp profile? Does this also require modification to the ramp cut in the frame? Virgil told me that he TIG welds new material onto the feed ramp and then reshapes it and blends it into the frame. I have over 1000 rounds through my Trojan since its been back from Virgil with zero problems. Link to comment Share on other sites More sharing options...
rmills Posted May 9, 2005 Author Share Posted May 9, 2005 What did Virgil charge for this service? Link to comment Share on other sites More sharing options...
Crusher Posted May 10, 2005 Share Posted May 10, 2005 From my own observations it seems the wilson/nowlin ramped barrels work with a wider range of OAL cartidge lenghts (from factory to long). The clark/para ramped barrel guns appear to like a longer OAL cartidge (as opposed to factory lenght 1.135) for feeding reliability. Link to comment Share on other sites More sharing options...
MBaneACP Posted May 11, 2005 Share Posted May 11, 2005 I'm a little bummed with Tripp right now. I ordered a couple of his .40 mags for my Trojan, and they worked excellent. I bought some more, and there appear to be feedlip issues...slam the magazine home, and rounds pop out the top. Happened on 2 out of 3 Tripp mags. Was planning on shootng the gun in the Area 6s...went back to a .45. Michael B Link to comment Share on other sites More sharing options...
XRe Posted May 11, 2005 Share Posted May 11, 2005 Michael, have you called Virgil to see if he could help you figure this out??? Also, are you sure you got .40 mags??? (should have the part # starting w/a "B"). Link to comment Share on other sites More sharing options...
Kevin Kline Posted May 13, 2005 Share Posted May 13, 2005 Michael, When I shot Lim10, I used Tripp mags a little bit. They were very reliable as far as feeding and by far the most reliable, but were the worst to reload. If there were 4 rounds or more in them, they would swell and would drop free. Now I know this doesnt happen much, but sometimes you only shoot 4-5 and make a mag change because you're moving from one spot to another and can't make it anywhere else. If that happens, you'd have to drag it out, not ideal. The Wilson 45 10 rounders were the best when slightly tweaked. They would get finicky sometimes, but you have to tweak them just right with the lips then they were OK and use silicone in the mags just to get any extra help. They were definitely easier to reload and drop free. 40 single stack, tough game. Link to comment Share on other sites More sharing options...
benny hill Posted May 13, 2005 Share Posted May 13, 2005 I have built several on the caspian race ready frame w/ schumman bushing barrels for IDPA shooters with McCormick mags & all run perfect. It is in how you fit the barrel from the start. Link to comment Share on other sites More sharing options...
walangkatapat Posted May 15, 2005 Share Posted May 15, 2005 I have built several on the caspian race ready frame w/ schumman bushing barrels for IDPA shooters with McCormick mags & all run perfect. It is in how you fit the barrel from the start. <{POST_SNAPBACK}> Could you educate me on this .40 single stack? Why would one want to go .40 singlestack rather than .45 if the mags only hold ten? Link to comment Share on other sites More sharing options...
benny hill Posted May 15, 2005 Share Posted May 15, 2005 Less recoil so better accuracy for most shooters. Link to comment Share on other sites More sharing options...
Rising Sight Posted May 15, 2005 Share Posted May 15, 2005 What did Virgil charge for this service? $121.00 and that includes shipping. Link to comment Share on other sites More sharing options...
Joe D Posted May 18, 2005 Share Posted May 18, 2005 Component cost is a big factor. .40 brass is almost free. .45 brass runs $35-$45m. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now