SHERMAN MEGA LINE

[sbruni]

one is being built but no data. I would expect to lose 30 + feet inch

Any updates on this build?

 

[Schw15]

What performance are you guys seeing in the 7 and 300 mega? Long and short actions?

What powders seem to work best

 

[RiverShooter]

Ive been thinking about this for a while now and decided to " pull the trigger" so to speak. I wanted to design a cartridge which would be hard to beat in 1000 yard bench and also be a hard hitting long range hunting choice. Well, the mid length 300 Mega it is.
With the mid length actions becoming popular And offering performance near the big capacity cases, Ive designed a case that is 2.150", holds 83 grains h20, has a . 342" long neck, and will run 3000-3050' with a 215 Berger on a std . 535" bolt. I should have brass, dies, and reamers by summer and plan on testing a 7 mm version in a couple months. There will also be a 338.
The 7 should push a 195 to 3050-3100 and the 338 a 250 Berger at 3000 at max.

 

[elkaholic]

What performance are you guys seeing in the 7 and 300 mega? Long and short actions?

What powders seem to work best

7mm with N570 will run the 180;s past 3200 (3100 with 195 at max) and the 300 with RL26 will push a 215 to 3050+.
338 with N550 at 2950 with a 250 Berger. 26" barrels

 

[In_Him]

@elkaholic Hey Rich, what are the bolt faces of the different lines of Sherman cartridges? I'm mainly looking at the Mega and Max in 7 and 338.

 

[codyadams]

@elkaholic Hey Rich, what are the bolt faces of the different lines of Sherman cartridges? I'm mainly looking at the Mega and Max in 7 and 338.

Sherman Wildcat Cartridges

Precision rifle cartridges with optimized efficiency for extended-range hunting and long range rifle competition.

shermanwildcatcartridges.com

 

[In_Him]

Sherman Wildcat Cartridges

Precision rifle cartridges with optimized efficiency for extended-range hunting and long range rifle competition.

shermanwildcatcartridges.com

Thanks Cody, but I've been studying the site and the load data results extensively. However, nothing states what bolt face the Mega and Max utilize? I'm assuming a magnum, but wanted to make sure.

 

[jeremy.b]

Max is based off SAUM, and Mega is based off *edit* similar to the WSM. So both standard Mag bolt face.

 

[Justice1327]

Can you use SAUM and WSM SAAMI spec brass and fireform it to SS and Mega?

 

[jeremy.b]

I had to check myself, the Mega is similar, but not really derived from the WSM. Both the MAX and Mega do use mag bolt faces, so that at least was correct!

I'd check with @elkaholic But I *think* SAUM brass can be formed to MAX. Mega I'm fairly sure cannot be formed from WSM because the neck would be too short.

 

[In_Him]

Max is based off SAUM, and Mega is based off *edit* similar to the WSM. So both standard Mag bolt face.

Thanks Jeremy!

 

[codyadams]

Max is simply an improved saum, 7 saum factory ammo can fireform to 7 max. Mega is it's own thing, wsm brass has been used in a pinch I believe but gives very short necks.

 

[Justice1327]

On the left is a 7mega on the right is the 7 mm WSM. The 7mega has a base measurement of .549 and the 7 mm WSM measures at .547.

I am not sure if the 7 mm WSM brass would conform to a 7mega chamber to match the shoulder angle and the neck length.

 

[In_Him]

On the left is a 7mega on the right is the 7 mm WSM. The 7mega has a base measurement of .549 and the 7 mm WSM measures at .547.

I am not sure if the 7 mm WSM brass would conform to a 7mega chamber to match the shoulder angle and the neck length.

Doesn't look like it. I know Rich said it wasn't really built off a parent cartridge, so this must've meant what he said. Basically an elongated wsm.