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Anyone own a 7mm 300 Win Mag?

 
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  #1  
Old 01-14-2010, 06:59 PM
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Anyone own a 7mm 300 Win Mag?

Yes, 7mm 300 Win Mag.

What do you think of it? I have a chance to aquire one. How does it differ from a 7mm Rem Mag?

28" custom barrel and I would want to shoot big BC bullets a long ways.

Any info would be appreciate about this caliber.

Thanks!

Jeff
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Old 01-14-2010, 09:36 PM
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Re: Anyone own a 7mm 300 Win Mag?

it will hold more powder.buy it and just tell us what you think.I have been thinking of building one myself.would think it would make the 7mm bullets fly a little faster.but might be one for shooting out the barrel faster too.
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Old 01-15-2010, 06:32 PM
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Re: Anyone own a 7mm 300 Win Mag?

I wouldn't buy it if it didn't come with dies as they could be expensive. Ought to be an easy round to form cases for and in a 28" barrel it should perform about like a 7 STW out of a 26" tube. 7 STW brass has been hard to come by recently but 300 WM brass ought to be available just about anywhere.
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Old 01-16-2010, 10:40 PM
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Re: Anyone own a 7mm 300 Win Mag?

Well I own it. The owner says it is a tack driver with 168 gr SMK's. We will see. It s a 1 in 9 twist and I am hoping it will shoot a 180 Berger well too.

Should be interesting. I will report in after I shoot it.

Jeff
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Old 01-16-2010, 11:15 PM
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Re: Anyone own a 7mm 300 Win Mag?

Simply guessing based on additional powder capacity... but I expect you'll get about 100 fps more MV than a 7mm Rem Mag with the 180 VLDs. Let us know how it goes. Sounds pretty interesting. It must have come with reloading dies too?
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Old 01-17-2010, 12:08 AM
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Re: Anyone own a 7mm 300 Win Mag?

Quote:
Originally Posted by phorwath View Post
Simply guessing based on additional powder capacity... but I expect you'll get about 100 fps more MV than a 7mm Rem Mag with the 180 VLDs. Let us know how it goes. Sounds pretty interesting. It must have come with reloading dies too?
Yes, it came with a set of Lee collet dies, a set of custom RCBS dies, a redding body die, and a few different bullet seating mandrels for seating different bullets.

If it shows promise I am going to restock it and I have some RWS 300 win brass I will feed it.

Jeff
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Old 01-17-2010, 03:51 AM
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Re: Anyone own a 7mm 300 Win Mag?

Broz, I have the numbers somewhere on exactly what you are gaining. I had considered having my .338 Win Mag reamed out to .338-300 Win Mag, but I was only going to get another 100 fps or so.


Running it through Quickload , real quick, I'm getting 3100-3150 with a 168 SMK with a 28" tube using RL22 & RL25. My guess is it will run 100-150 fps faster than a 7mm Rem Mag.

7mm RM with a 168gr SMK set at 3.4" has a usable case capacity of 75.645, using the .300 WM case at the same coal it shows 85.512

Last edited by Tang; 01-17-2010 at 03:54 AM.
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