Do you use 9mm mags or .38 Super mags in your 9x23 pistols? I know that Metalform makes 10-rd. capacity mags in .38 Super so you might give those a try. FWIW, I use their .38 Super mags (9-rd.) in my 9x23 and have never experienced any problems.
In my 9x23 pistols I use the .38 Super mags. In my 9 mm pistols I use the 9 mm magazines, but have used the Super Mags on occasion. I really didn't have any problems that I can remember. However, I would like some 9 mm 10 rounders for matches.
Chip McCormick is out of stock at CDNN and at Midway but with stock promised the end of August. Wilson is out of stock at Brownells - I don't know about dates.
I like the quality of the Wilson but I'm not quite sure the layout of the feed lips is optimal - it may be, and it may be there is just enough difference between the .38 Super straight case and the tapered 9X23 - I'm not sure the Chip McCormick are quite so well made but I'm sure they are as well designed.
I'm quite sure most everybody uses .38 Super magazines in the 9X23 because the 9mm magazines are blocked for length - there is some dispute whether it is better to block the back or front of the magazine.
IIRC Metalform offers 10 round capacity in .38 Super with their standard quantity discounts:
Colt Model 1911 .38 Super (Xtra-Capacity FlushFit) -38-790 or with a B 38-790B for prices varying from [email protected] $31+ to 200 @ $12+ more with a black pad. I have no idea whether Metalform would be shipping from stock.
But I don't think Metalform has any shimmed for the 9X19 to take 10 cartridges. I've heard tales of using the .38 Super magazines for everything in part because folks are long loading the 9X19 as part of the hangover from make major with a cheap case.
Danger Will Robinson, actually I should save that for something dangerous, any way been down that road maybe I can save you some money, For whatever reason there arnt any 9mm ten rounders just 38 super, which as you said "match" wont work, Chip and Wilson 10 round 38 super mags (which run fine in my 9mm) become 9 round match mags as the tenth round is so tight a tac reload becomes nearly impossible to do quickly, metal form mags hold and will easily seat 10 rounds but very quickly turns into a 9 round mag because the spring is so soft it quits feeding the last round, now maybe the slightly larger web diameter of 9mm brass to 38 causes them to be a little tighter but I dunno, If by match you mean IDPA, sit down with you last several COF's I found out that I am allways better off with 9+1 in the gun as allmost all stages are division neutral best way to do that is 12 rounds usually 6 bad guys, that way revolver's reload once, CDP 7 or 8 round guys reload once, and esp and ssp 10+1's reload once, difference is a 10+1 guy will either have to do a tac reload (or COF may state slide lock reload) or shot 2,2,2,2,2 ,1 reload and reingage same target 1, where as a factory listed 9+1 gun goes 2,2,2,2,2 reload 2. even if not 12 COF's in IDPA are lmost allways multiples of 6. SO while you wont be disadvantaged by 9+1 you will frequently have an advantage. Course if you shooting make up shots you are probably allready loosing anyway and if you are shooting IPSC yeh your screwed.
The Super is a shade smaller in the back than the 9x23 and 9mm. I have never been able to load 10 rounds of 9mm or 9x23 in super mags. Actually I did force 10 9x23's in a Wilson mag but it left no play and jammed my gun solid since it put too much pressure on the slide.
I used the Wilson 38 Super mags for 9mm. Worked fine, after I left them loaded with 9rds for a while, then I could get the tenth in. Use them some and they seem to work fine. Now, I don't put one up the pipe, take out the mag, and try to put another in and reload it. That would probably case problems.