Home Forums Hunting & Shooting Custom Rifles & Wildcats 7mm Remington or Mashburn

laker

Be different and go with the Mashburn.
Indulge the sickness.
You can set up the freebore to suit the bullet and mag length you have.

Look at it this way....in 1.5 years, when you decide you are over the rifle and decide to sell, The Mashburn might sell here in the classifieds to a select few. The 7 Weatherby or Rem Mag will sell anywhere.

The Dakota is great...but I didn't like the brass. The stuff (several bags)I had was splitting at the body/shoulder junction on second firing. At the cost of the stuff, it was annoying. I sold the rifle despite very good ballistics.The Dakota taught me to distrust brass from proprietary small shop cartridges....things don't always go as planned,and I don't know why but I don't need the grief.

I'd rather have good,old WW 300 Win Mag brass and form a Mashburn(nothing to it)....bomb proof and trouble free.

The OP can throat a 7 Rem Mag for a 160 seated to the base of the neck,and will pick up a bit of speed with the 160(not much IME despite several). The neck is too short and he will have jump with lighter bullets...this is not always bad,but bothers some people who like to seat close to the lands..

No matter what you do to a 7 Rem Mag it will never be as fast with any bullet as a Mashburn. The Mashburn has a longer neck and body than the 7 Rem Mag. Mechanically it's a better cartridge.Been shooting mine for the past 4 years and a friend has two others, one a M70 and the other a punched out 7 Rem Mag M700, which is a very easy conversion.We have fired them all plenty of times.

In any of the three it is easy to use Retumbo, H1000,or RL25 to get 3200-3250 with a 160 gr bullet and decent case life; you will also do 3050-3075 with a 175 gr bullet from a 24" barrel. Anytime we try with either of these bullets, these are the velocities we get,even given different barrels and we aren't blowing any primers doing it.I have goosed a 160 to 3330 fps with Retumbo by "accident" with no ill effects but don't recommend it.

I have never run any bullet lighter than 160 grains from mine...not much point in it for me,but some Mashburn users I know have used the 150 TTSX at about 3300+- fps with good results on game from moose on down.

I can't quantify velocity performance vs cost of dies,etc...a wildcat is a "want", not a need,and the two criteria don't intersect. If it did, we would not see things like the 280AI,7x57AI etc, etc. If you have to think about a wildcat in these terms, you likely should get a factory offering that does the same thing.

I have both here right now, having just gotten a new 7 Rem Mag with standard throat. I shoot 150 BT's and Partitions in it.It works fine and I don't have any plans to throat it long,having been down that road with several rifles.


Edited to add: There is no wait time for RCBS Mashburn dies far as I know. They are more expensive but are listed as a catalog wildcat. Redding might be different.I think mine were the first they ever made with cases fired in my rifle.

The Dakota is great...but I didn't like the brass. The stuff (several bags)I had was splitting at the body/shoulder junction on second firing. At the cost of the stuff, it was annoying. I sold the rifle despite very good ballistics.The Dakota taught me to distrust brass from proprietary small shop cartridges....things don't always go as planned,and I don't know why but I don't need the grief.

I'd rather have good,old WW 300 Win Mag brass and form a Mashburn(nothing to it)....bomb proof and trouble free.

The OP can throat a 7 Rem Mag for a 160 seated to the base of the neck,and will pick up a bit of speed with the 160(not much IME despite several). The neck is too short and he will have jump with lighter bullets...this is not always bad,but bothers some people who like to seat close to the lands..

No matter what you do to a 7 Rem Mag it will never be as fast with any bullet as a Mashburn. The Mashburn has a longer neck and body than the 7 Rem Mag. Mechanically it's a better cartridge.Been shooting mine for the past 4 years and a friend has two others, one a M70 and the other a punched out 7 Rem Mag M700, which is a very easy conversion.We have fired them all plenty of times.

In any of the three it is easy to use Retumbo, H1000,or RL25 to get 3200-3250 with a 160 gr bullet and decent case life; you will also do 3050-3075 with a 175 gr bullet from a 24" barrel. Anytime we try with either of these bullets, these are the velocities we get,even given different barrels and we aren't blowing any primers doing it.I have goosed a 160 to 3330 fps with Retumbo by "accident" with no ill effects but don't recommend it.

I have never run any bullet lighter than 160 grains from mine...not much point in it for me,but some Mashburn users I know have used the 150 TTSX at about 3300+- fps with good results on game from moose on down.

I can't quantify velocity performance vs cost of dies,etc...a wildcat is a "want", not a need,and the two criteria don't intersect. If it did, we would not see things like the 280AI,7x57AI etc, etc. If you have to think about a wildcat in these terms, you likely should get a factory offering that does the same thing.

I have both here right now, having just gotten a new 7 Rem Mag with standard throat. I shoot 150 BT's and Partitions in it.It works fine and I don't have any plans to throat it long,having been down that road with several rifles.


Edited to add: There is no wait time for RCBS Mashburn dies far as I know. They are more expensive but are listed as a catalog wildcat. Redding might be different.I think mine were the first they ever made with cases fired in my rifle.

Bob,

How fast can you run the 150's in the standard 7mm magnum?

Dink

[quote=laker]Like my Remington actions and plan to stick with it