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Anyone own a 7mm 300 Win Mag?

 
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  #365  
Old 07-28-2013, 09:53 AM
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Location: South FL
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Re: Anyone own a 7mm 300 Win Mag?

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Originally Posted by AZShooter View Post
Nice groups Skyking!

Chuckhammer: I have a 7mm/375 Ruger not the LRM. It is a 375 Ruger case necked down short neck and all.

Using RL-33 with 180 Berger target hybrid. Barrel is a SS 29 1/4" 6 groove lilja.
Most accurate load is 83 grains for velocity of 3175 fps. I did work up to over 85 grains with velocities over 3200 fps but groups opened up.


I am certain RL-33 would work with the heavier 7mm bullet offerings in a 7mm/300 win mag.
Good info, thanks. I believe I'll reach 3200 with a 180 in my Valkyrie but it may not be at a node. The full 1"bull contour should help soften the nodes.
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  #366  
Old 07-29-2013, 09:50 AM
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Re: Anyone own a 7mm 300 Win Mag?

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Originally Posted by Dick Tinsley View Post
Really great groups, Skyking!!! What velocity with that load?
I did not crono it. I went from Nosler brass to Norma and had a new lot of h1000. So I backed it down. I am guessing in the 3030fps range. My normal load is 74g of Retumbo gives me 3140fps
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  #367  
Old 07-29-2013, 10:27 AM
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Re: Anyone own a 7mm 300 Win Mag?

SkyKing,
When I Tested REtumbo And H1000 In My 30Inch 3 Groove Lilja, I Didn't Crest 3000 Fps Until 80+ Grains Of Charge. I'm At A Mean Elevation Of 3450 Ft, But That Doesn't Account For The Drastic Difference In Velocities. Any Ideas On What Is Going On? My Chronograph Is An Oheler 35.
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  #368  
Old 07-29-2013, 11:29 AM
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Re: Anyone own a 7mm 300 Win Mag?

Quote:
Originally Posted by Skyking View Post
I did not crono it. I went from Nosler brass to Norma and had a new lot of h1000. So I backed it down. I am guessing in the 3030fps range. My normal load is 74g of Retumbo gives me 3140fps
Thanks for the info! I understand that brass varies an some more than others. That being said, I've got a lot of remington an Winchester brass that I'm getting ready now. My 7/300 will have a 28 kreiger, 700 rem action! I'm just trying to get a starting point. Guess I'm putting the cart before the horse. I've got about 4 pounds of Retumbo an 6 pound of H-1000. Anyway, thanks for your info!

DT
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  #369  
Old 07-30-2013, 04:55 PM
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Re: Anyone own a 7mm 300 Win Mag?

Quote:
Originally Posted by garou22 View Post
SkyKing,
When I Tested REtumbo And H1000 In My 30Inch 3 Groove Lilja, I Didn't Crest 3000 Fps Until 80+ Grains Of Charge. I'm At A Mean Elevation Of 3450 Ft, But That Doesn't Account For The Drastic Difference In Velocities. Any Ideas On What Is Going On? My Chronograph Is An Oheler 35.
If you look back on page 44 i think you can see the delays of me gun. 80g. HOLY COW! I have no idea how you are not seeing pressure with that much powder, and that slow of speed. I know those chrono are a great one, but I would not live and die by those numbers. Have you tested you actual drops at distance? That will give you your true speed. I am shooting at 4500FT, I have always heard that Lilja barrels are slow, but something is definitely not right.
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  #370  
Old 08-02-2013, 06:06 PM
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Join Date: Oct 2007
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Re: Anyone own a 7mm 300 Win Mag?

So fellas, I read through this entire thread. What is the con census, can the 7mm RM be improved upon?
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  #371  
Old 08-02-2013, 06:15 PM
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Join Date: Jul 2010
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Re: Anyone own a 7mm 300 Win Mag?

For bullets >140-150 gr, it appears so. Efficiency and bbl life appear to lose more ground for bullets lighter than that.
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