Aforum55 Posted August 15, 2019 Share Posted August 15, 2019 Just had some 170 STI gen 2 mags tuned and put grams springs and followers in. Loaded to 29 rounds, the first round nose dives and won't chamber. Run 28+1 and it's no problem. Springs are brand new so I loaded mags to sit for a day or two. How many rounds is everyone getting in a big stick? Link to comment Share on other sites More sharing options...
Sarge Posted August 15, 2019 Share Posted August 15, 2019 Mine hold 28 Link to comment Share on other sites More sharing options...
Kema Posted August 15, 2019 Share Posted August 15, 2019 28 with my own basepad and follower.Tried extremely low follower and decided that 28 is all it can do if mag is no longer than IPSC 170mm limitation allows. Link to comment Share on other sites More sharing options...
RawTime Posted August 15, 2019 Share Posted August 15, 2019 28 with the gen 2 Sti mag. If i use a gen 2 mbx 170 I can 30+1 if I leave it with 29 loaded first night. Worth the extra money imo Link to comment Share on other sites More sharing options...
zzt Posted August 15, 2019 Share Posted August 15, 2019 Fully reloadable 29 in my MBX mags. I could barely squeeze 30 in, but it definitely would not be reloadable. Leave your mags fully loaded for at least a week. I generally do for two weeks. After the springs take a set, you should have 29 with a little room to spare. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted August 15, 2019 Share Posted August 15, 2019 I've been getting 29 in my STI and SVI Gen I's for a decade. How did we lose a round going to an improved version ? Link to comment Share on other sites More sharing options...
robb315 Posted August 15, 2019 Share Posted August 15, 2019 I can get 29 in my STI gen 2 170’s with a tiny bit more room than my old style SV big stick. Grams spring/follower and Taran 3mm pad Link to comment Share on other sites More sharing options...
sauza45 Posted August 15, 2019 Share Posted August 15, 2019 Sti gen 2 grams springs and followers TTI pads 29 reloadable Link to comment Share on other sites More sharing options...
Aforum55 Posted August 15, 2019 Author Share Posted August 15, 2019 I've loaded the springs and will see what happens once they settle in. Seems like 28/29 is the standard u less you go with MBX. I'll let ya know Link to comment Share on other sites More sharing options...
bigboy69 Posted August 15, 2019 Share Posted August 15, 2019 28 with grams follower and spring. I believe gen2 STI Link to comment Share on other sites More sharing options...
Whoops! Posted August 15, 2019 Share Posted August 15, 2019 Whenever I see anything with round nosediving related to magazines, I immediately think adjust the feed lips. And it’s always worked for me in the past. Link to comment Share on other sites More sharing options...
Aforum55 Posted August 15, 2019 Author Share Posted August 15, 2019 Just did that. All feed lips are now perfect. Have to run 28+1. Can't start with 29 to start Link to comment Share on other sites More sharing options...
zzt Posted August 15, 2019 Share Posted August 15, 2019 (edited) Even perfect feed lips will nose dive the first round if the spring is too strong. If your springs don't take enough set, you can go to a TTI +1 follower and spring Add a gen2 3mm pad and you will easily get 29, possibly 30. Edited August 15, 2019 by zzt Link to comment Share on other sites More sharing options...
Sprig Posted August 16, 2019 Share Posted August 16, 2019 29 re-loadable in a mbx 170 but can start with 30 + 1 if want to . When the springs are new i can't fit the 30 but after a bit of use it works. Link to comment Share on other sites More sharing options...
Maximis228 Posted August 16, 2019 Share Posted August 16, 2019 29 in ST mags with grams or TTI guts (28 reloadable) and 30 with MBX mags (29 reloadable). This would be for 9 major. Link to comment Share on other sites More sharing options...
blackfatbob Posted August 16, 2019 Share Posted August 16, 2019 17 hours ago, Aforum55 said: Just did that. All feed lips are now perfect. Have to run 28+1. Can't start with 29 to start Fool around with different bullet shapes. Something with more of a shoulder that contacts the feed ramp higher would be my guess. Feed ramp adjustment or longer COL might help too. Try to simulate the failure with dummy rounds and take a very very close look at what's going on at the bullet/feed ramp. That should tell the story. Link to comment Share on other sites More sharing options...
pjb45 Posted August 17, 2019 Share Posted August 17, 2019 Sorry: only SV mags. In general, reloadable 29-30. Either a TT follower (and tuned by TT) or silver SV adds an extra round, 31 sometime reloadable but mostly non-reloadable. Again. TT tuned my mags. Link to comment Share on other sites More sharing options...
jnkill Posted August 17, 2019 Share Posted August 17, 2019 Mbx 29 reloadable, 30 +1 Link to comment Share on other sites More sharing options...
traingq Posted August 20, 2019 Share Posted August 20, 2019 30 with my MBX 170 mags Link to comment Share on other sites More sharing options...
NamesNotMike Posted August 29, 2019 Share Posted August 29, 2019 (edited) With STI gen 2 tubes, Grams guts and TTI 3mm base plates I get 29 reloadable in 2 of them and 29 but not reloadable in the other 2. But it took a little while before I could reload the 2, they were too tight at first. The other 2 are just too tight so I use them to start with and save the others if I plan on reloading to big stick. Edited August 29, 2019 by NamesNotMike Link to comment Share on other sites More sharing options...
Benji Posted August 30, 2019 Share Posted August 30, 2019 Dang, I get 29 pretty easily in my STI with grams. I only get 28 in my SV's though. I have heard that removing some material in the bottom of the baseplate is helpful but I haven't had to do that in the STI. Link to comment Share on other sites More sharing options...
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