UMC shotgun shells.

[Noz]

I have a chance to buy some 12 ga brass UMC shells.
I have experience with the Magtechs.

I am assuming that the UMCs will require the 209 primer?

Will they also accept standard 12 ga wads or must I go a step higher as with the Magtechs?

[Pettifogger]

Most of the brass UMC shells use large rifle primers.  They are also usually thicker than the more recent imported brass shells.  Good hulls if you can get a bunch of them.

[Mako]

Nozzlerag,
Pettifogger is right they use either large pistol or rifle primers if they are the original UMC shells.
Mako

[Steel Horse Bailey]

Nozzie Rag:

Here's another suggestion:  Circle Fly Wads   KNOWS brass shells.  Call them and they will steer you in the right direction - whether you buy from them or not.  (I WOULD - good prices, great service)  They'll probably tell you to get 11 ga. for over-powder and spacer wads, and 10 ga. over-shot wads.  There are all kinds of good solutions to seal the over-shot wads:  I've used: nothing, wax, Elmer's, Elmer's wood glue, Sodium Silicate/"Waterglass" available at Tractor Supply as a horse health product, and Duco.  I like Sod. Sil./Waterglass best - I have a quart,  but any of the water-based glues will dissolve when you plop your fired shells in water after firing.  One bad thing about the glue; being water-based, it WILL eventually dry up and begin to crack.  (I found a box I'd loaded a year before - I simply added some more waterglass and it was fine.)  Besides, by using a 10 ga. over-shot wad it'll probably keep the shot in place WITHOUT the glue, unless you use a heavy charge, which CAN loosen the wad and allow the embarrassing spectacle of shot dribbling out the end of your barrel after the first shot!  NO - I have only heard about it.    I didn't use anything on my first box of 25 and had no "leaks."  My load is a "square" load: 1 0z/Vol of 2 or 3f and the same volume of shot.