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7MM Super Mag?

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09 July 2002, 11:37
<Fireball221>
7MM Super Mag?
What is it? what case.......what are the balistics like?
Just seen a Barrel for sale in this caliber.
fireball
09 July 2002, 11:50
<IKE>
The 7SM is a .357 Maximum case necked down to 7mm.

Just think of the 7SM as a short necked 7TCU and according to the folks at Sierra you can substitute 7TCU data for the 7SM.

I've got a off the rack 14" factory TC Contender barrel in the chambering that is a absolute tack driver (1/2" 5 shot groups at 100yds) that I some times shoot IHMSA with.

I'm loading Winch. 357 Max cases, WSR primers, 30.5grs of BLC-2, Sierra 120gr #1900, with a OAL of 2.483.

It's a sweet little cartridge.
09 July 2002, 11:55
TCLouis
Have any idea of velocities with this combination?
Wondering if losing that 0.1" of case length is serious!
Well you did say 7mm TCU loading data . . .
Hmmmm?
Any info would be appreciated.
LouisB
09 July 2002, 12:23
<Fireball221>
quote:
Originally posted by IKE:
The 7SM is a .357 Maximum case necked down to 7mm.

Just think of the 7SM as a short necked 7TCU and according to the folks at Sierra you can substitute 7TCU data for the 7SM.

I've got a off the rack 14" factory TC Contender barrel in the chambering that is a absolute tack driver (1/2" 5 shot groups at 100yds) that I some times shoot IHMSA with.

I'm loading Winch. 357 Max cases, WSR primers, 30.5grs of BLC-2, Sierra 120gr #1900, with a OAL of 2.483.

It's a sweet little cartridge.
Thank you IKE!! Think I just found my NEXT barrel!
Wonder if the VV Shorty sale is still on.......
Fireball
13 July 2002, 18:17
<Paul Dustin>
FireballBB you might like at this websight I know he has some 7mm super mag listed www.edstc.com/edstc/index.html [Eek!]