cheers

Those will fit in the USPSA box but not the IPSC box (which is smaller).

With the plastic basepad and a bit of careful filing: you can make the Tripp "System" mags fit into the IPSC box with 10 rounds. I have done it.

Tripp does not show the "System" mags on their website but if you phone them, they will put them together for you. Then you need to get them into Canada. If you are shipping to Canada you will need to keep the purchase of each shipment to under $100.

-ivan-
 
If "you're a 9mm guy" and you already have a 9mm 1911 Single Stack: then you don't want 10 round 40 mags (or 10 rounds 10mm mags either).

If you have a 9mm 1911 Single Stack: use that to shoot Classic division with minor ammo. You can compete with 10 round mags when you shoot minor.

If you don't have a 9mm 1911 Single Stack gun but you want to shoot in Classic division with a 40, I recommend sticking with major and shoot with 8 round mags.

If you want the best of both worlds and want a 40 S&W 1911 Single Stack gun so that you can shoot either 8 round major or 10 round minor, then you want the Tripp "System" mags that can hold 10 rounds and fit in the box, after you file down the mag base pad (but you had better have a box on hand when you file: because it's a tight fit and there is very little room for error in filing).

Depending on the gun you use: some guns perfer that you load the ammo long to get maximimum reliablity. In this case you are still shooting 40 S&W ammo, but you are loading them longer than factory length. For this you need to use 10mm mags instead of 40 S&W mags. Tripp sells both, and will make the "system" mags for both 40 and 10mm.

... did I cover all the bases?
-ivan-
 
Keep in mind when shooting a 1911 in 40:
- some 1911s are finicky when running the 40
- running more than 8 rounds means the guns get even more finicky

If you have your heart set on running 10 rounds of 40, and have it fit in the box: get one or two mags first and experiment. If all is well: get more mags.

-ivan-
 
My gun fits in the box with the system mags, just had to tweek the front angle on the base pads a bit. if you are running a high rear sight that may cause issues too.
The tripp mags are awesome if they run in your gun. they are very tempermental. I had to get a custom magcatch made for my range master frame to make them work. could not make them work in a friends trojan, even with my high mag catch. Wilson's are great if you are OK with only having 8 rounds. Metalform also makes a 10 round 10mm
 
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