7mm Blaser Mag experience?

[Michael O'Connor]

Just ordered a 7-300 Blaser mag imp reamer. 35* shoulder and build on the 2.540" long 300 Blaser brass. it's a longer version of the 7 Blaser. Hoping for a 92-93 gr case cap.

Why don't you just go with a 28 Nosler and save yourself all the hassle.

 

[Smokinghole]

He's right 300 Blaser Mag is basically the same dimension at 30 Nosler. You'll be using the same brass manufacturer even. If you want a longer neck and something that fits in a DBM I get it then.

I'm getting a reamer made for 28 Nosler brass with the shoulder knocked back to 33 Nosler dimension. It's basically a 7 Dakota but without the bigger case head and with out the garbage Hornady brass that the Dakotas use now. If the ADG brass becomes a reality for 7LRM I will likely abandon the whole project. So I'm waiting to see.

Why don't you just go with a 28 Nosler and save yourself all the hassle.

 

[6.5x300]

Resurrecting an old thread here, this one got a little side tracked with going bigger.

I would be interested to here more about those of you shooting the 7mm blaser or even a 6.5-7mm blaser.

I have read just about everything online about this case and think it is a well thought out and designed case. I was looking for something exactly half way between the WSM and the big Noslers with good brass, my research/quest brought me to the 7mm Blasers.

BT

 

[Michael O'Connor]

The 7mm Blaser Magnum is ideal with it's 2.35" Cartridge Length for long High B.C. bullets such as (~1.53") 180 grain Berger Hybrid with a SAAMI COAL spec of 3.340". It is too much overbore to be necked down to a 6.5/ 7mm Blaser, IMHO. It has a usable powder capacity of 76.25 grains in the standard unimproved case.

 

[highdrum]

The 7mm Blaser Magnum is ideal with it's 2.35" Cartridge Length for long High B.C. bullets such as (~1.53") 180 grain Berger Hybrid with a SAAMI COAL spec of 3.340". It is too much overbore to be necked down to a 6.5/ 7mm Blaser, IMHO. It has a usable powder capacity of 76.25 grains in the standard unimproved case.

Necked down its basically equal to a 264wm. Not know for barrel life. However powders have come a long way, and if you don't abuse it by shooting it hot, it should last a long time.

 

[Michael O'Connor]

I somewhat agree, but a SAUM based 6.5 SST Sherman would be my choice for a efficient and powerful case. Good luck, Sir.

 

[6.5x300]

I'm currently shooting the 6.5wsm from a long action with custom bullets at 178 grains pushing them to 3000 fps. I think the 6.5-7mm Blaser would not be too overbore for my needs and probably feed better for hunting purposes then the WSM.

I do like the looks of the Blaser, is anyone shooting it yet in a 6.5?

 

[Edd]

I checked the volume of my 6.5-7mm Blaser cases using H-1000 powder. Filled to the bottom of the neck, they hold 74.4 grains.

 

[6.5x300]

The SST does look great and looks to have been optimized for the short action.

I don't mind the idea of a long action and feel like the SST to the short, the Blaser is to the long action.

BT

 

[6.5x300]

Thanks Edd, I'll have to check the WSM. How do you like the 6.5 Blaser?

 

[Danny1788]

I'm currently shooting the 6.5wsm from a long action with custom bullets at 178 grains pushing them to 3000 fps. I think the 6.5-7mm Blaser would not be too overbore for my needs and probably feed better for hunting purposes then the WSM.

I do like the looks of the Blaser, is anyone shooting it yet in a 6.5?

Where are you getting 178GR 6.5mm bullets from? Any data on those big boys

 

[B23]

I think the 6.5-7mm Blaser would not be too overbore for my needs and probably feed better for hunting purposes then the WSM.

I do like the looks of the Blaser, is anyone shooting it yet in a 6.5?

I would agree with you, I don't think a necked down 6.5 Blaser would be to overbore. In a 26in barreled rifle I wouldn't want anything larger than the Blaser case though, and if a 6.5 Blaser is considered too overbore, what does that make the 26 Nosler or 6.5-300Wby???

Obviously, I'm partial to the 7mm Blaser, but I think a 270 Blaser and or 6.5 Blaser slinging the heavy for caliber bullets would be a great match up, particularly, if you don't want to run a real long barrel.

In a 26in barrel, the 7mm Blaser mag case makes for a great hunting usable size rifle that really gives up nothing to the much larger case capacity cartridges like the 28 Nosler, 7 LRM, or some of the different wildcats.

Nothing wrong with overbore cartridges, I have a few myself, but I think once you get to a certain size case, in order to get the benefit of all that case capacity/powder you need longer barrels than 26 inches. Nothing wrong with 28+ or ++ length barrels but they aren't always the easiest to hunt with and, just my opinion here, but when you start going longer than 26 you also need to go a little bigger profile as well, which all starts adding a good amount of weight and before you know it, you've got a much heavier gun than you were originally expecting. I speak from experience on that because I have some that ended up being considerably bigger/heavier than I originally planned. Nothing wrong with those, but depending on your type of shooting/hunting those big heavy long rifles aren't always the most convenient to hunt with.

 

[6.5x300]

Danny,

I make the 178s myself. I'll post some info on them soon in a new thread. Shot from a 7 twist with RL-33 in 28" 6.5WSM at 3000fps. Bullet is 1.59" in length. I think it would be a good match in a 6.5 Blaser.

Here is a quick link with a few pics....

http://castboolits.gunloads.com/showthread.php?385867-BTSniper-heavy-6-5mm-180-grain-VLD-bullet!!!

BT

 

[Danny1788]

Danny,

I make the 178s myself. I'll post some info on them soon in a new thread. Shot from a 7 twist with RL-33 in 28" 6.5WSM at 3000fps. Bullet is 1.59" in length. I think it would be a good match in a 6.5 Blaser.

My twist is probably too slow at 1-8 but I have a long throated 264WM that would probably be pretty cool with that bullet.