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Rem 700, 7mm Rem Mag Re-Build, Pt 1

 
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  #8  
Old 02-23-2013, 01:07 AM
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Location: Green River, Wyoming
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Re: Rem 700, 7mm Rem Mag Re-Build, Pt 1

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Originally Posted by 65WSM View Post
...What about magazine length with the 180 Bergers? What would you like to seat to if the magazine allowed? How far off the lands are you?...
Well I just checked again and I'm currently 0.010" off the lands with a cartridge OAL of 3.425" and 1/4" of room still in the magazine, so I doubt I'll have problems there. This of course means those 180 grainers are stuffed deep in the cartridge but with 69 gr of Retumbo I can still feel the "shake" of the powder in a loaded round. So, depending on high-pressure signs, I still have room for more powder if necessary... We'll see...
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Old 02-23-2013, 12:51 PM
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Re: Rem 700, 7mm Rem Mag Re-Build, Pt 1

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Originally Posted by shawnb View Post
Nice rifle. Can't wait to hear how it shoots. What are the load components your using? Brass, primer, into/away from lands?

I just got my hands on some of the 180 hybrids to try. They are shooting around 2960 out of my 26" lilja 9t. They held 1/2moa at 500yards test. They were 5 thou off at an oal length of 3.52". No pressure or nothing. Another member brentc is getting some pretty good numbers from his 28" barrel also.

Keep us posted
Shawn, what is your ogive length with the hybrids?
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Old 02-23-2013, 01:35 PM
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Re: Rem 700, 7mm Rem Mag Re-Build, Pt 1

I honestley dont even know. I have the rcbs mic tool and im not sure if that can give the measurement. And im guessing my velocity is a bit faster. My trued velocities always seem yo be a little faster than what my chrono spits out.
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  #11  
Old 02-23-2013, 04:41 PM
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Re: Rem 700, 7mm Rem Mag Re-Build, Pt 1

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Originally Posted by shawnb View Post
CB11WYO- how much does that gun weigh? And what contour did you end up going with. I really like that look.
I honestly can't remember the exact contour, it finishes at .750" at 28". Its a heavier contour than the old barrel and will hopefully shoot better too. On the digital bathroom scale she read 10.8 lbs, no bipod or ammo.
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Old 02-23-2013, 05:05 PM
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Re: Rem 700, 7mm Rem Mag Re-Build, Pt 1

Alright guys so I got out to shoot this morning! About 25 degrees, light snow falling, and slight breeze from 3 o'clock.

I started with 3 rounds loaded with 66 gr Retumbo to foul the barrel and make sure the scope was on. (FYI all shooting was done at 100 yards) Then proceeded to shoot four, 4 shot groups of 66gr, 67gr, 68gr, and 69gr Retumbo, respectively. I'm rather pleased!


I was smiling from the start after the first 4 rounds of 66 grain loads. 3 of the 4 are in one oblong hole 67 grains was so so. The 68 grain 4-shot group is actually almost identical to the 66 grain load as far as total group size is concerned (between 0.400" and 0.415" center to center) and then the 69 grain load which was almost identical to the 67 grainer.

Since I would like the most velocity possible I'll be working with the 68 grain load. So I'll be back to the loading bench again working up some 67.5, 68, and 68.5 grain Retumbo loads. We'll see how much variance comes in with these 3

Thanks for following and I'll continue to keep ya posted!!
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Rem 700, 7mm Rem Mag Re-Build, Pt 1-4-shot-7mm-rem-mag-66-gr-ret.jpg   Rem 700, 7mm Rem Mag Re-Build, Pt 1-4-shot-7mm-rem-mag-68-gr-ret.jpg  

Rem 700, 7mm Rem Mag Re-Build, Pt 1-4-shot-7mm-rem-mag-69-gr-ret.jpg  
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  #13  
Old 02-25-2013, 10:09 PM
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Re: Rem 700, 7mm Rem Mag Re-Build, Pt 1

Try the 69-70 grain range. My setup is very similar to yours and I'm able to push the 180s up to 3060 fps. I have an accuracy node at 69.5 to 70 grains. Another load to try is 69.0 grains of H1000 with your choice of primer for 2950-3000 fps. If you look at the current Hodgdon data, both powders max at loads higher than I stated, but be careful and watch for pressure signs. The retumbo loads tighten up in ES close to max.
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  #14  
Old 02-25-2013, 10:30 PM
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Re: Rem 700, 7mm Rem Mag Re-Build, Pt 1

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Originally Posted by CB11WYO View Post
I honestly can't remember the exact contour, it finishes at .750" at 28". Its a heavier contour than the old barrel and will hopefully shoot better too. On the digital bathroom scale she read 10.8 lbs, no bipod or ammo.
This is about the same as my Pac nor #6 contour. Mine comes in right at 11 lbs with my Mark 4.
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