7mm Blaser Mag Reloading Data

[highdrum]

@jpndave the 7lrm is perfect capacity for your needs however the brass is junk, you can find a node, usually 71-72gr H1000 with Berger hybrids that'll run over 3k consistent, but brass is junk in 3-4 loads. 7 blaser improved is what I'd go with. I personally just ordered a 26" proof barrel on a cyber Monday special yesterday, and I'm thinking about making a 7 blaser wildcat with a 40° shoulder and very little taper, would look like a 7 Sherman short that has stretched out another 0.3" giving it around 88-89gr powder cap, and still having the long neck.

 

[GoosePilot]

@jpndave the 7lrm is perfect capacity for your needs however the brass is junk, you can find a node, usually 71-72gr H1000 with Berger hybrids that'll run over 3k consistent, but brass is junk in 3-4 loads. 7 blaser improved is what I'd go with. I personally just ordered a 26" proof barrel on a cyber Monday special yesterday, and I'm thinking about making a 7 blaser wildcat with a 40° shoulder and very little taper, would look like a 7 Sherman short that has stretched out another 0.3" giving it around 88-89gr powder cap, and still having the long neck.

any idea on how many fps you would lose if you did a 24" pr barrel. i havent ordered my barrel yet and may be running a can. will be used primarily as a mountain hunting gun. would it be worth it to carry and handle the 26"?

 

[highdrum]

any idea on how many fps you would lose if you did a 24" pr barrel. i havent ordered my barrel yet and may be running a can. will be used primarily as a mountain hunting gun. would it be worth it to carry and handle the 26"?

25-30 fps/inch I'd guess. I don't own a rifle with anything shorter than 24". If you're going to suppress, I'd run a 7mm wsm or Sherman short in a 22" barrel, since most suppressors will add 7" minimum. But they do give you another 50fps or so.

 

[jpndave]

What are you all seeing with COAL for a 7 Blaser and 180gr (ELD-M and Hybrids) bullets? Any chance this would work in a mid-length action?

 

[B23]

What are you all seeing with COAL for a 7 Blaser and 180gr (ELD-M and Hybrids) bullets? Any chance this would work in a mid-length action?

In my 7mm Blaser the OAL with 180 Berger hunting VLD is 3.260 and that is 5 thou off from touching.

 

[Camo wsm]

Goose, Camo is in Australia FYI, I don't know if you're looking for a smith in the states or what.

Hey all I'm based in New Zealand and the 24" one I started with last week it's at about 25 rounds down it and velocity is looking like 2970 FPS or there abouts with 180 ELD M's

 

[Michael O'Connor]

Hi all, I am looking at building up a few 7 Blaser rifles, one for myself and a few for clients. What does the "improved" version change? Does anyone have a copy of that print? The 7mm Practical seems pretty close to the ideal except I hate belts. The 7 LRM seems promising except for the lack of decent brass. I don't want to step into the really overbored cases. 7 WSM (which I have) and 7-300 WSM seem just a little small to consistently get 180s over 3000fps. The Blaser is pretty much right there. I'm thinking optimize the reamer for 180 ELD-M and hybrids, maybe pull some taper out of the sides otherwise leave it alone.

Thanks for the info posted here.

Dave

It should shoot 7mm 151 gr. Warner Flatline Solids with a G7 B.C. @ .360 to ~3300 FPS with a 26" Barrel. 3050 to 3080 FPS with a 180 gr. Berger Hybrid.

 

[GoosePilot]

Any updates? Getting close to getting my improved version done
.

 

[midnightmalloy]

Any updates? Getting close to getting my improved version done
.

I was shooting 195 Berger's with RL 26 but didn't like how hard I had to push it and the temp instability over 80 degrees. I think with a 26" barrel the 175-180 class bullets will be best.

I'm going with either a 175 Berger EOL or Hornady ELDX with H1000. For what I do I need ultimate reliability and I didn't like how hard I had to push the 195's. A 175 at 3000+FPS will be fine for all my needs of this rifle.

 

[GoosePilot]

Have shot my improved version about 130 rounds. Looks like it turned out well. Fire forming is as accurate as anything. 24" 1:8 proof cf

H1000 at 68.3g, f215, eol 195g, is going 2850fps and shooting 2" groups at 500 yd.

Tried retumbo today. Got a node at 2810-20 exactly like h1000 did. Did not see a node at 2850 though. Looks like another node at 2912-18, but start getting some bolt lift at 2880.

So retumbo gained about 21 fps over h1000, but not enough to comfortably get to next node. Would imr 8133 get me another +40-50 fps over retumbo before pressure? Can vv n570 be found? Anything else to try? Just stay with h1000 at 2850 fps?

 

[FURMAN]

Have shot my improved version about 130 rounds. Looks like it turned out well. Fire forming is as accurate as anything. 24" 1:8 proof cf

H1000 at 68.3g, f215, eol 195g, is going 2850fps and shooting 2" groups at 500 yd.

Tried retumbo today. Got a node at 2810-20 exactly like h1000 did. Did not see a node at 2850 though. Looks like another node at 2912-18, but start getting some bolt lift at 2880.

So retumbo gained about 21 fps over h1000, but not enough to comfortably get to next node. Would imr 8133 get me another +40-50 fps over retumbo before pressure? Can vv n570 be found? Anything else to try? Just stay with h1000 at 2850 fps?

I do not have a BM but N565 is close to H1000 in burn rate but is yielding around 50fps more with Berger 156s in the 6.5 PRC. It might be worth a try.

 

[chetraguse]

Anybody tried N570 in their blaser with the Berger 195's?

 

[chetraguse]

Back up any body tried n560 or 570 in their 7 blaser?

 

[Bghunter338]

Just curious if anyone has load data for a 160gr class bullet? Thanks.