nhglyn Posted February 6, 2005 Share Posted February 6, 2005 OK, now I'm puzzled. I have STI 170 mm mag bodies and Limcat +1 basepads (Grams followers and springs) and I can only get 26+1 in the gun (38 Super). I have read on STI website (http://www.stiguns.com/cart/aboutmags.html) that I should be getting 28+1. Only way I can get 28+1 is to add the +3 basepad to the 170 mm, which then makes it 175 mm and illegal. What am I doing wrong here? Link to comment Share on other sites More sharing options...
Brazos Custom Posted February 6, 2005 Share Posted February 6, 2005 Are you sure you have 170mm tubes? There are quite a few variations out there that are not quite 170mm long. Link to comment Share on other sites More sharing options...
nhglyn Posted February 7, 2005 Author Share Posted February 7, 2005 Bob, yes I am sure. Link to comment Share on other sites More sharing options...
gary meyer Posted February 7, 2005 Share Posted February 7, 2005 grams makes a base pad which is supposed to give you 29 plus 1 but I can only get 28... Link to comment Share on other sites More sharing options...
Jon Merricks Posted February 7, 2005 Share Posted February 7, 2005 I would look into sending the mag to Bob or Beven to get tuned. You should be getting 27-28 with no problem, I have not used the Limcat pads though. Gary, You will probally only get 29 if your running super comp or 9x19. Link to comment Share on other sites More sharing options...
eerw Posted February 7, 2005 Share Posted February 7, 2005 I have a 9x23 and 9mm and can get 29 +1 One mag is tuned by Beven and has the old style follower/spring with a 4mm Grams pad..the other is untuned but runs the Grams new follower/spring with a Dawson +1 pad.. I have another shorter bigstick at Beven's now and will let you know what he does and what I get..when it returns... Link to comment Share on other sites More sharing options...
J.L. Hardy Posted February 7, 2005 Share Posted February 7, 2005 nhgyln, if you are using standard 38 super (not super comp) you will get at least 1 less round than the rimless varaitions. if you have a true 170 mm mag tube and either a dawson +1 or bevins mag pad then you shoud easily get 28 of any of the rimless. usually you can get 29 out of an sv tube and some sti tubes, but the sti will be tight on the last couple. check to see if the spring is longer than the other ones ( if you have another) a coil or two could cause it to hold less. also when everything is new you sometimes have to bump the mag against your palm to settle the rounds down and then put in the last 2. good shooting, j.l. hardy Link to comment Share on other sites More sharing options...
Brazos Custom Posted February 7, 2005 Share Posted February 7, 2005 Check the outside dimension of the tube the width should be 0.940 to 0.950. If it is not the rounds may be binding in the tube. If it's a new tube and you can't figure it out return it and get another one. On another note be careful putting a 4mm pad on an SV mag. Most of the SV tubes are longer than the STI's and the 4mm will be too long in almost every case. I have seen several people bragging on their SV that would hold 29-30 rounds and when measured did not fit the gauge. Link to comment Share on other sites More sharing options...
TeamGE Posted February 7, 2005 Share Posted February 7, 2005 Ok guys, the straight scoop. 29 rounds is obtainable with the right parts and a good tube. As Bob pointed out, size of the tube does matter. 29 rounds, (useable and reliable) is a fuction of the tube having the right internal dimentions, and taking advangage of the USPSA mag length gauge at 171.25mm. Most long mags will be too long with my 4mm base pad attached. It is designed to be used when the OAL of the mag will be checked for length and then the tube is modified to fit the gauge. Some tubes (SV mostly) are way too long, and can not be cut down far enough, so my 2.5mm base pads are in order. If you guys don't have a guage, don't just asume that your mags will be legal. Using 38 supercomp (rimless 38 or 9 x whatever) does make a difference, as JL pointed out. Standard 38 super will work better if you keep a short OAL, (1.225, +/- .005). Link to comment Share on other sites More sharing options...
OpnBlstr Posted February 8, 2005 Share Posted February 8, 2005 Out of curiosity, why does cartridge OAL make a difference in mag capacity? I ask because I load my supers to 1.270 to get them on the ramp ASAP. Link to comment Share on other sites More sharing options...
TeamGE Posted February 8, 2005 Share Posted February 8, 2005 OpnBlstr, The semi rim of the 38 super will stack better, (rim into groove of next round) and will make a little more room in the mag. Link to comment Share on other sites More sharing options...
OpnBlstr Posted February 9, 2005 Share Posted February 9, 2005 Ah ha! Gotcha. I will have to load some rounds shorter and see how they stack in the mags. Too bad I don't have x-ray vision! Right now I get 27 reliable rounds in my 170. 28 will fit but it won't reliably strip the next round and generally jams the pistol. This is the same no matter whose mag guts I have in there. Thanks for the tip! Link to comment Share on other sites More sharing options...
dirtypool40 Posted March 3, 2005 Share Posted March 3, 2005 just confirming the above; My new SV 170mm with a Dawson +1 and GE guts holds 29 and works. Link to comment Share on other sites More sharing options...
Garrett Posted May 9, 2005 Share Posted May 9, 2005 I have a STI/Para 170 with Grams guts and tuned by Beven. I get 29 with Supercomp or 28 with Super. Link to comment Share on other sites More sharing options...
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