7-300 Norma Mag Improved. IT’S ALIVE!!

WOW VERY NICE. AWESOME.
That's a Shooter, so is the guy squeezing the trigger. Thanks for sharing. 👍
Thank you! Shot everything on 15X lol

I'm waiting for that 4 groove to start blowing up them eldms!
Hahaha first time it happens will probably be on a big buck 😅. At least I know they're shooting now, so I'll have good data if and when they start coming apart.
 
Id try some rl50 in that cartridge. The flame temp is lower than n570 and h50bmg. It might buy you some barrel life

H20 capacity is about 108gr with lapua brass. It should be real close to the 7rum data.

I have one of these builds coming up also for a good customer, just waiting on the reamer.
 
Thank you! Shot everything on 15X lol


Hahaha first time it happens will probably be on a big buck 😅. At least I know they're shooting now, so I'll have good data if and when they start coming apart.
They will, Been there with mine lol. Throat leaves the chat and they start blowing up after about 2 shots. Had to let it cool before it would put a 3rd on paper lol. Currently waiting on a 5r. Mine did it around 250 round count.
 
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For us frugal (cheap) ones, it will be interesting to see how long the barrel last since it is a super 7. I know the OP isn't concerned. lol.
I smoked one in 250 rounds. Not entirely the guns fault. I was trying different things, pushing it hard, and didn't let it cool like I should have I'd say. Still had good accuracy but the throat was gone and it started having blow ups.
 
Throw the retumbo and h1000 in the trash

*note, the trash is actually at my place now, my gun room is "the trash". 😁

Congrats on a SICK rig OP, looks and shoots amazing, and barrel life be damned we want PERFORMANCE! Those who worry about the barrel should just get a .308 winny and be happy! 🤣. Besides, if the current barrel doesn't die then there's no reason to ever try a new barrel and chambering on this action in the future, and what fun is that!?!? 🥴
 
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They will, Been there with mine lol. Throat leaves the chat and they start blowing up after about 2 shots. Had to let it cool before it would put a 3rd on paper lol. Currently waiting on a 5r. Mine did it around 250 round count.
Good to know! Did you switch to a berger to see if it held together better? I could test some 190 LRHT's.

Id try some rl50 in that cartridge. The flame temp is lower than n570 and h50bmg. It might buy you some barrel life

H20 capacity is about 108gr with lapua brass. It should be real close to the 7rum data.

I have one of these builds coming up also for a good customer, just waiting on the reamer.
Good to know! Yeah I hate to handicap the case capacity with H1000, but **** that stuff is clean burning and consistent and mild on the throats.

Might have another barrel chambered ASAP too.

I have a Benchmark 8.5 twist in the safe. Waiting to see if I like the cartridge haha
 
Throw the retumbo and h1000 in the trash. You don't run a Lapua bolt face to not run N570. N570 is the captain now. Plus it does a good job with fire cracking compared to the others. I want to see 3400 and a deer killed this coming season.
Hahaha this might just be a brass forming barrel before its shot out 😅
 
Good to know! Did you switch to a berger to see if it held together better? I could test some 190 LRHT's.


Good to know! Yeah I hate to handicap the case capacity with H1000, but **** that stuff is clean burning and consistent and mild on the throats.

Might have another barrel chambered ASAP too.

I have a Benchmark 8.5 twist in the safe. Waiting to see if I like the cartridge haha
Berger is all I shoot. I did get some custom Swedge 180s from robinett to try. Still the same deal. It's just time for a 5r with a new throat lol. You got a nice round, and I'm glad I have mine. I wouldn't change a thing besides starting out with a 5r on mine. I've learned a lot from it. If you want a hot rod 7, I can't think of a better one. Let that thing cool is the main thing. Mine gets hot quick. I did take it out last day of rifle season to do some doe patrol on a corn field. Farthest one out that night was only 780 yards but it hit perfectly with the current shot out barrel.
 
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