Glk21C

SPS mag tubes are notorious for being out of spec in regards to side to side width and/or the double stack to single stack transition area being too wide. Your best bet is to contact SPS or the US importer and ask for replacement tubes.

Wide enough so the rounds don't pop out upwards past the feedlips

if you don't mind push-through sizing (I personally don't), this is the answer.

It was, been moved to so. MD

You can do it with a Lee 9x18 makorov fcd die. Do a search here on be.com. I've done 1000's of 9mms this way.

Dry Fire Tech https://www.dryfiretech.com/

Do a search on the subject, you'll find lots of info

The method of squeezing the forward control ribs in the double stack to single stack transition area of a double stack mag is not something unknown to fix nose dive issues. Do a search here on be.com and you'll find this mentioned on a whole host of different types of double stack mags. What you have to be careful of is keeping the tube square while squeezing it, which they don't show you in the video. If you're not careful you'll create many more problems with the tube while trying to just squeeze that one area. Good luck

The core issue is the tube is a little too wide. If you are not mechanically inclined don't attempt to squeeze it down a little, you'll wind up causing more issues to the tube. I'd contact infinity and see what they'll do.

Grams on mine

http://forums.brianenos.com/forum/308-rudy-project/

Which is probably the extractor tension is a little light. I thought the ckarms guns typically come with instructions for how many aftec springs and when to add and whatever, based on how many rounds through it

Answers in order of your questions: Yes Yes Only one day Yes, there will be a match hotel, keep abreast to Bill's (MD) email and FB blasts The Best (I'm biased since I know the MD and are part of his team...??) Yes No, not insane

I know their barrels used to be made in South Korea so this is not surprising to me.

Beven is the best

Anything up to 140mm will be 11 coil

OP states he has Gram's springs and followers so the springs are designed correctly.

1. Is that near the bottom of the tube? Looks like a compressed spring and maybe the basepad I am seeing? 2. Does your magazine (magazines) have control ribs going down the sides of the tube? I seem to recall Tanfoglio mags having that? If yes to both my questions then the follower is getting hung up on the bottom of those control ribs. Smooth those areas out and the problem should go away. Again, assuming I am correct the tube gets wider at the bottom so the rounds want to spread out. You really can't change that but since Beven designs his spring and follower to ride the right side of the tube that small transition needs to be smooth. Dremel, sanding drum and 400 and 600 wet/dry sandpaper will take care of it. Good luck

Couldn't tell you, my only objective was to see how close I was to making major/get a starting point. When the time comes to start experimenting with it again I'll start loading at 9.5 and probably go up to 10.0, see where those land and at that point see how the gun is reacting with each load over major.

I did try 9.2 grains behind a 124 rn cmj mg. Avg. Velocity was 1311, which was the low 160's pf in my gun.

My remembrance on this might be backward but at least for the 9mm/38 tubes the 1st generation new style had 9mm/38 super stamped in them. The latest generation has only 9mm. Someone who bought the new style when they first came out earlier last year and did not chuck them in the garbage can verify what the 1st generation tubes had stamped on them.

The inherent problem in both iterations of the new style STI tubes is the double stack to single stack transition area is off, hence the nose dives. "Maybe" an aftermarket spring and follower will appear to correct the nose dive issue but the reality is the problem is still there. Why do I say "both iterations" of the new style tubes? When they originally came out the nose dive issues were prevalent. Some will remember STI had a fire sale of the new style magazines in late 2017, something like buy 2 get 2 free and the such. That helped clear out inventory of those 1st generation new style tubes. Knowing the nose dive issues they went back to the actual manufacturer they contracted to make the new tubes and tried to reposition the control rib in the double stack to single stack area. That is the current generation, which still is not reliable. Otherwise, everything else about the new style tubes is built well. You'll notice on Atlas's FB page he has a short video of what they discovered and how they are fixing it. Luckily the dog does not get shot....

At our local club we don't charge the new shooter for the first time shooting our match; does not matter if they are new to shooting or already experienced in competitive shooting. Majority of the time they come back again and gladly pay the match fee.

The potential for more capacity over Dawson's BP's is available in Gram's BP's and TTI BP's since the internal surface on the bottom of both BP's have a slight taper. Dawson's do not have this, it's flat. Personally I prefer Gram's BP's over any other brand. Good luck

You need to contact CK Arms and ask them if they bevel the bottom of their frames to accept current Infinity tubes. Sounds like they don't? If you do a search (I forget where it is) you'll find where the frame modification is the proper fix. Messing with the mag catch hole or mag release is not a proper fix, as you'll find when reading the threads about this. Here you go: