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Assume the Mashburn cleans up a rem mag chamber?

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"I would build one again, if it were not for my 350RM (grin)."

MtnHtr
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Nevermind... It does...

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"I would build one again, if it were not for my 350RM (grin)."

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My experience has with the WSM and RM has been a bit different than yours Jordan. Not much but a bit different. My experience with the WSM is the same as other WSM's verses the standard mags. I've found that the standard old mags generally will top the WSM's by 100 fps or so. Now I can lean on the WSM's and get them to the standard mag speeds for sure. But leaning on a round to get to a certain number just isn't my style anymore. And that's coming from a fella who was for years President of the Red Liner club... grin

This is my experience with the 160's but I've found the WSM to be good for 2950 and up to 3K if I push it. The standard 7 RM I can run at 3050 and up to 3100 if I push it. All 3 of my Mashburn tubes have done 3200 with ease and can be run harder if I wish.

Once again this is just me but, for the most part anymore I when working with a new barrel I work up to what I feel is top end and then I back off 100 fps. Then I get to it, but that's just my way.

Any of them of course will get it done, it's up to the individual shooter to sort out which one turns their crank. Cause any of them will get it done.

Just the way I've found it.

Dober


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Well, then, I'm glad that YOU and Mr. Mashburn have found happiness together so late in life, too.........


The CENTER will hold.

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Hey Dober,

Good stuff. Experience is what counts here, rather than theory, that's for sure.

The Ramshot load data shows a max charge of Magnum giving velocities close to 3100fps for the 7WSM with 160/162gr bullets. This is in line with my own experience and load data. I use a load of IMR7828ssc that is 0.5gr over the max load listed on the IMR website, but I see an average of 3081fps from my rifle. My experience with the 7RM has been nearly identical (which it should be, since the case capacity of the two cartridges is almost exactly the same), except that if you push it really hard I've seen 3100-3150fps at the top end with a 160gr bullet. I'm perfectly happy to run the WSM or RM at 3050-3100fps with a 160.

I know the MSM could get me an extra 100fps, but I just don't think that would affect my hunting or shooting even one iota. Like I said before, I certainly wouldn't mind building a Mash, but it would be for conversation's sake and the "cool factor", not for the "performance gain".

It's blowing snow sideways here right now. How are things going down that way?

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Dober and Bob---how many shots have you guys got out of a 7 Rem Mag before either accuracy really started to drop off...or you felt you had burnt out the barrel?


Originally Posted by archie_james_c
I should have just
bought a [bleep] T3...


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Originally Posted by Mark R Dobrenski
Short action, I'd be all over the 7 WSM, long action slamo dunk for me it'd be the Mashburn Super.


[Linked Image]

Anutha take via Flight 7 MSM... wink

Dober


If you lose that much meat with the 7's, you can keep em'.


Travis


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Trump being classless,tasteless and clueless as usual.
Originally Posted by Judman
Sorry, trump is a no tax payin pile of shiit.
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My young wife decided to play the field and had moved several dudes into my house
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Seems to me that a .284" pill with a bitchin' BC run over 2700+ is pretty much awesome smile

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Jeff:Sorry about that...I thought you were giving me the needle.... blush smile

I agree with Dober....the case gets more velocity, easier, with the heavy bullets than the smaller 7mm mags,from 24" barrels as well,and across a wide range of rifles and barrels.

Everyone who has built one has been happy.... smile





The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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Got a set of dies you want to sell?

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30338, A while back,you ask about cheap 7mm Wea. brass...I make my 7mm Wea. brass from 7mm Rem. Mag. brass, just run it though the die and it comes up a bit short...works wonderful...on a long Rem. 700 action it has been moving the 160's out at over 3200fps.. but it has a 26.5 in. barrel and the 160's are seated to the base of the neck...probably longer than can be achieved in a Wea. rifle.....
Still, I like the sound of the Mashburn...my old 7mm Rem. could achieve new life with a rechambering job...


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Originally Posted by Mark R Dobrenski
My experience has with the WSM and RM has been a bit different than yours Jordan. Not much but a bit different. My experience with the WSM is the same as other WSM's verses the standard mags. I've found that the standard old mags generally will top the WSM's by 100 fps or so.

This is my experience with the 160's but I've found the WSM to be good for 2950 and up to 3K if I push it.

Dober



I have had just the opposite experience. I have played with a grand total of ONE 7WSM but I can easily get 2950 with 180s from it and I can barely get that with 168s in the THREE 7mm Rem Mags I loaded for this year. Maybe I need to find better recipes. I dunno.

I get 3150 from 7x300 Wby and 3200 from 7RUM so I think the 2950 is about in line.


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Or you could go with a 7 mm LRM. 375 Ruger necked down. I think you could easily get 3150 with 180 Bergers maybe more. I'm shooting mine with 71 gr of H 1000 and am getting 3035 but its so darn accurate its scarey. I might try to see what I can get after I run out of the ammo I have loaded.

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I wondered about that 375 case.


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Getting 3050 from my 7mm dakota with 180 grn vlds, 1-8 and 25 1/2 in barrel

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Originally Posted by 30338
Got a set of dies you want to sell?


30338: Unfortunately I don't... frown I have Reddings and they now have the prints for them as I think my pal and I had the first sets thay made. These are FL, but RCBS has them for Form, Trim,and FL. Some guys are just using the FL dies to form the shoulder and new neck; I have not tried it.

Reading the other posts is interesting on the velocities of the Dakota (had one) and the speculation on the 375 Ruger case.These are all about the same capacity as the Mashburn, but use less available and more expensive brass than the Mashburn, which is formed from common and available 300 Win Mag stuff.

I don't see any velocities from any of the others listed with the 175-180 that the Mashburn could not do as easily. They all have about the same case capacity.It would be no trick to break 3000 with a 180 from a 24" tube.

Plus,if I ever get tired of the Mashburn, my rifle can become a 300 Win Mag,an STW,or a 7RM with a new tube.

With the Dakota, I was stuck with the Dakota cartridges, and brass I could not form from anything else at $2 bucks a pop.

Al, I never really did a round count with the 7 Rem Mag but have cooked...I dunno...4-6 tubes(?). I am guessing they hung in about 2000-2500 rounds, maybe more(?).

If I were going tactical/target I would not build a Mashburn; I'd go with something like a SAUM....but this is my hunting rifle,my "big rifle",built to use where others would grab a 300 magnum of some sort.I shoot it almost every week,but not a lot. I only shoot to stay in touch with it....my bullet and load development is mostly done.

BTW any Rem 700 in 7 Rem mag becomes a Mashburn with a simple pass of the reamer...no need to do another thing. Pretty easy.My next one will be done that way.

Last edited by BobinNH; 01/11/12.



The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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Originally Posted by joelbiltz
Or you could go with a 7 mm LRM. 375 Ruger necked down..... I'm shooting mine with 71 gr of H 1000 and am getting 3035 but its so darn accurate its scarey.


Here's a good example...Joel is getting 3035 with 71-H1000 180 Berger (barrel length not stated)with the Dakota. I get 3075 with the 175 NPT and 73-H1000 from a 24" Mashburn.Close enough.

A necked down 375 Ruger is the 7mm Dakota,for all practical purposes.All three of these cartridges are different versions of the same thing.

In the Mashburn,I have seen the same velocities with H1000, Retumbo, RL 25 and H870,with different rifles and Krieger,and Rem 700 tubes.....all are 24".

Some of this will vary depending on barrel length,and type of barrel;but across the board these cases all give up the velocity easier than the smaller capacity 7mm's,especially with 160-175 gr bullets.




The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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WyomingCoyoteHunter: There was a Mashburn put to use on that ranch I told you about this past year wink smile




The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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My bbl is 25.5 without break 26 with. It seems to be a slow bbl but extremely accurate so I won't complain. Aaron said with the same load most of their rifles were staying at 3100 with 71 gr of H1000.

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joel that seems to make sense with the longer barrel and all... smile

88Man is tracking the same vels basically....see his post above.

Last edited by BobinNH; 01/11/12.



The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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