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it's not going to be Mag Pro

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d4570 View Drop Down
.416 Rigby
.416 Rigby

Joined: 27 January 2004
Location: United States
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    Posted: 26 January 2020 at 15:07
My son and I were "testing" today.
No wind and not freezing, no mud.

We had a ton of stuff to test too.

17,7 mm/0,7 mm/30 Waters. 8 MM RM.

For whatever reason, we just ant get the magnetospeed to work at all. It sure would help, not a lot of load information of the 8mm. The 17 had 2 groups of 5 loads to test, one was very promising. The 7 mm/08 he was trying three groups of 3 with heavy for the caliber bullets, I think he said 167 Bergers. He found all 3 shoot VERY good and will explore them some more. The Waters was just practice. Then the 8.

We would shoot 3 and then something else.

Mag Pro with Sierra 220's and Barnes 200's.

None of which worked remotely well and it was the only one that showed any sign of presser, stiff bolt at max.

They're all very upper-end loads and should shoot very near or over 3000 fps.

We tested h-1000 in both Not very impressed with the Barnes but the 200's shot very well like an inch. We can't go higher with it, just ant get anymore in the case, as it is you really have to stand on it to get the bullet seated.

Reloader-26 was also tried. It did nothing within parameters with the 220's but produced a very workable load with the 200,s We will try it some more still able to go up a little more. It looks like we picked the two we will work with. 54 test rounds with 2 factory loads to foul with, I cleaned it twice in the test. I sure can tell the 220 from the 200, WAY more recoil out of the 220's. Testing at 100 yards.

I stand by my statement that my 870 has a lot more felt recoil than the 8mm RM.FbClick and drag to move

Remember: Four boxes keep us free ,the soap box, the ballot box, the jury box, AND the cartridge box
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Wing master View Drop Down
AKA StraightShooter

Joined: 10 June 2003
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wing master Quote  Post ReplyReply Direct Link To This Post Posted: 28 January 2020 at 01:25
I have shot your 870 with your coyote loads. It was pretty salty but not unbearable. I assume you won't be shooting large quantities of 8mm at a time so I think it will be a great hunting round. 

Retumbo might be something else to try in your 8mm. It's a slow powder that should be good for magnum loads. Also, If I'm not mistaken it is supposed to be less sensitive to temperature than some other powders. 

Wing master
I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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