Nemo Posted February 12, 2004 Share Posted February 12, 2004 If it's already been posted, I'm sorry but I did a search on the issue and didn't come up with the answer. Here we go... Grams advertises base pads in 2.5 and 4.0 millimeters. The USPSA mag length gauge would accept mag+basepad array of up to 141.25mm in length. What is the overall length of the STI tubes and/or which Grams base pad should I get for my 140mm tubes (STI) to remain limited legal? Thanx! Link to comment Share on other sites More sharing options...
diehli Posted February 12, 2004 Share Posted February 12, 2004 If you spend the bux to have Beven tune your mags, he makes sure that they fit the guage with the 4mm pads. From the "better safe than sorry" school of thought (that has you shooting ammo that makes higher than 165.1 power factor), the 2.5s are better if you just want eerily simple basepads that make cleaning and reassembly ridiculously easy. Arredondo mag brush + Grams pads = super easy disassembly, cleaning, and reassembly. This, of course, is JMHO. BTW, mag tubes measure at around 5-3/8" or about 137mm. This gives you less than a 3/4-millimeter of play (which is a lot when it comes to tolerances) with the 4mm pad, but, again, better safe than sorry. Link to comment Share on other sites More sharing options...
Nemo Posted February 12, 2004 Author Share Posted February 12, 2004 Gotcha Big Ape! Thanx a bunch! Link to comment Share on other sites More sharing options...
Shooter Grrl Posted February 12, 2004 Share Posted February 12, 2004 You really should send Grams the 140mm to tune and put on the basepads. David is getting an easy 20 rounds in his after the MagMaster worked his magic, with the 4mm and full Grams internals. Link to comment Share on other sites More sharing options...
Fireant Posted February 13, 2004 Share Posted February 13, 2004 Shooter Grrl, Is that a reloadable 20 or do you have to take some out to be able to reload with one in the chamber? Link to comment Share on other sites More sharing options...
Shooter Grrl Posted February 13, 2004 Share Posted February 13, 2004 Easy to load and easy to reload I can manage it just fine! Link to comment Share on other sites More sharing options...
grim death Posted February 13, 2004 Share Posted February 13, 2004 If you send the mags to Beven, he will tune the mag ,reshape the feed lips and will make sure that with the base pad on it will be limited legal.Old style svi tube will get 21 rounds and the sti tubes get 20 without a problem.The new Grams format also makes it really nice. Link to comment Share on other sites More sharing options...
Nemo Posted February 13, 2004 Author Share Posted February 13, 2004 Thank you all for the info! Now, would you give me a ballpark figure of how much is every mag gonna make me poorer... Link to comment Share on other sites More sharing options...
Shooter Grrl Posted February 13, 2004 Share Posted February 13, 2004 http://www.gramsengineering.com Lists SV/STI Basepads at $30 I'm not sure what the tuning costs, I'm thinking around $40 each, but call Beven and ask! Link to comment Share on other sites More sharing options...
diehli Posted February 13, 2004 Share Posted February 13, 2004 Should run about $80.80 a mag w/ internals, tuning, and basepad. Link to comment Share on other sites More sharing options...
kevin c Posted February 14, 2004 Share Posted February 14, 2004 Beven puts in witness holes into Para tubes,and gets them plated for the customer. That, and the tuning for $40. Dunno if your tubes would need the holes or plating. Link to comment Share on other sites More sharing options...
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