Thread: Info please: 7mm Blaser build & Data

Seeking some info from the 7mm experts over the ditch.

I am looking at building a 7mm Blaser on a M700 RUM action

Curious what dies people are running, twist rate/bullet weights and ideas on loads if running ADI or Hodgdon’s powders


Thanks in advance

Have you considered 28 Nosler?
I believe brass would be easier to get, and more load data available

Originally Posted by Tribrit

Have you considered 28 Nosler?
I believe brass would be easier to get, and more load data available

From what I have seen from the US, barrel life is as little as 800 rounds.

When I looked last the wholesaler had 900 rounds in stock. At approx $130-150AUD/50

We are only JUST seeing Nosler brass on the shelves again @ $160-180AUD/25

The 7 Blaser mag makes more sense than the 28 Nosler

Similar performance with around 10 grains less powder.

The Nosler dies are cheap but the brass is expensive & hard to get here

The Blaser dies are expensive but the brass isn't & is easy to get here

You can build a Blaser on a Tikka, the Nosler not so much

The Blaser appears to have the accuracy edge with the rifles I've built & the barrel will no doubt last longer than the Nosler

Now I will just go & get a fire extinguisher & some Pop corn

I have just been getting the hang of a new 7BM. I wouldn't be worried if I only got 800 down the tube, that is a lot of deer! You cannot argue with a 180 doing 3090fps!!
The thing is bad ass acurate, super quiet with a suppressor on and comfortable to shoot without.
Have only tried Rl26. You will see pics of it here https://www.nzhuntingandshooting.co....-magnum-54659/

7mmBM is a really great calibre. I'm getting ~3060 fps w RL26 1:8 twist 26 in bbl put together for me by @Kiwiw Greg. It's a frickn laser .... tightest groups from any boom stick I've owned, well under 0.5moa.
Also have N28 Christensen Arms MESA also 26bbl but 1:9 twist. Yep gets an extra 100 - 120 fps but takes a heap more powder (RL33) to get there. 88 - 89 gns RL33 with 180 ELDMs running at 3180 fps. Groups at ~ 0.7 moa.
If I was to chose one over the other it would be the BM.

Originally Posted by Gkp

I have just been getting the hang of a new 7BM. I wouldn't be worried if I only got 800 down the tube, that is a lot of deer! You cannot argue with a 180 doing 3090fps!!
The thing is bad ass acurate, super quiet with a suppressor on and comfortable to shoot without.
Have only tried Rl26. You will see pics of it here https://www.nzhuntingandshooting.co....-magnum-54659/

Bugger the rifle, I want one of those carbon stocks.
Best looking stock Iv seen.

280AI, long barrel, ADI2225. 180eldms now loaded down to 2950 as barrel is coming towards the end of its life but started at over 3100

Originally Posted by superdiver

280AI, long barrel, ADI2225. 180eldms now loaded down to 2950 as barrel is coming towards the end of its life but started at over 3100

That is going good, what length is the barrel?

28"