My latest 7mm Rem Mag has a 26" bbl and I used R26/160 SBTHP and R33/175 SBT; around 3150 for the 160 and 3050 with the 175. In your 24" bbl you should hit your goals easily. I used a Fed 215M primer in ww Cases. Do a seach and you will see what these guys posted for me with QL and these two newer powders. To be honest, I almost pulled my hair out ( I had a lot more of it then too!) back in the late 70's/early 80's trying to get 3100 from the 160 PT out of a 24" Mod 700. Back then I used H870, 7828 and MRP ( just about identical to R22) I settled on...tada..IMR 4350 and 2950. It killed like crazy, so no biggy....but I just "wanted" that 3100! ha. 35yrs later I got it...in a 26" bbl. You can find a 26" Savage 7mm rem mag bbl and have put on a lot easier than reaming out a 24"bbl to a wildcat. So, I hope you get your goals and I wouldn't worry about what I said IF you aren't an OCD inclined, far gone wilidcat influenced handloader, ha! BTW, I have relatives down in SE Texas ( read lots of mud/rain) who use identical Savage rifles as yours in 7 mag and factory ammo. They get those rifles plumb filthy, wipe them off and go hunting! They couldn't tell you what weight bullet most of the time or speed in their rifle. They sit around at night and argue about calibers, etc and shoot their deer/hogs around 100yds most of the time, ha. Every now and then, one will snipe one off the pipeline around 300yds....he then becomes "insufferable"....like me, ha! Good luck to you Pard.
7mm Rem Mag - AB vs Part, RL22 vs RL25
- Thread starter LifeAndLiberty
- Start date
LOL preacher is right!
My experience with the 7 Rem Mag parallels his,and I always felt the case could have used a little more capacity and a longer neck to get the velocity I wanted from a 24" barrel.In the meantime I hunted with 3 that I completely wore out,shot out the barrels,and hunted with every where.
So the Mashburn came only after I had grown bored with 40+ years using other 7mm magnums,and while I feel it is clearly a "better" cartridge design than the 7 Rem Mag,and much easier to achieve solid 7 Mag velocities in a 24" barrel, its performance is not so far removed from a standard 7 Rem Mag.....which in a way makes a lot of sense because Remington had the 7mm Mashburn pressure/performance data at its labs when they developed the 7 RM. They knew what it was all about.
I don't run around encouraging everyone to build a 7mm Mashburn Super because it's like telling someone who they should marry
People who build wildcats are usually experienced enough to know exactly why they want to do it.
The 7 Rem Mag is a great, universal BG cartridge as is.
My experience with the 7 Rem Mag parallels his,and I always felt the case could have used a little more capacity and a longer neck to get the velocity I wanted from a 24" barrel.In the meantime I hunted with 3 that I completely wore out,shot out the barrels,and hunted with every where.
So the Mashburn came only after I had grown bored with 40+ years using other 7mm magnums,and while I feel it is clearly a "better" cartridge design than the 7 Rem Mag,and much easier to achieve solid 7 Mag velocities in a 24" barrel, its performance is not so far removed from a standard 7 Rem Mag.....which in a way makes a lot of sense because Remington had the 7mm Mashburn pressure/performance data at its labs when they developed the 7 RM. They knew what it was all about.
I don't run around encouraging everyone to build a 7mm Mashburn Super because it's like telling someone who they should marry
People who build wildcats are usually experienced enough to know exactly why they want to do it.
The 7 Rem Mag is a great, universal BG cartridge as is.
You won't hate the Mashburn if you do build one though. The only added expense is the dies. After that it's all a wash...
Mines been really easy to work with. Cases just won't give up and it takes those big charges like a champ.
7mm Wby data will give you a great place to start as well.
Mines been really easy to work with. Cases just won't give up and it takes those big charges like a champ.
7mm Wby data will give you a great place to start as well.
I don't run around encouraging everyone to build a 7mm Mashburn Super because it's like telling someone who they should marry
People who build wildcats are usually experienced enough to know exactly why they want to do it.
And like Scotty, I never worried about what dies/etc "cost" to have a rifle wildcatted or Improved! When I wanted it, I wanted it and made it happen! ha Life is too short to "make do"...and only experience can really show you what "can do and will do actually do!:.
People who build wildcats are usually experienced enough to know exactly why they want to do it.
And like Scotty, I never worried about what dies/etc "cost" to have a rifle wildcatted or Improved! When I wanted it, I wanted it and made it happen! ha Life is too short to "make do"...and only experience can really show you what "can do and will do actually do!:.
preacher":2w6r5ftb said:I don't run around encouraging everyone to build a 7mm Mashburn Super because it's like telling someone who they should marry
People who build wildcats are usually experienced enough to know exactly why they want to do it.
And like Scotty, I never worried about what dies/etc "cost" to have a rifle wildcatted or Improved! When I wanted it, I wanted it and made it happen! ha Life is too short to "make do"...and only experience can really show you what "can do and will do actually do!:.
Preacher I guess that's why I built mine 5-6 years ago....
- Thread starter
- #28
LifeAndLiberty
Beginner
- Dec 20, 2015
- 59
- 0
What about the 7mm STW? Performance seems fairly identical to the Mashburn, Nosler makes factory brass for it, its a SAAMI approved case, and I've got book loads for it.... maybe a better place to start as opposed to the Mashburn?
The STW is a great cartridge for sure. It requires the same 3.6" or longer mag box a Mashburn would, probably even longer to really see the benefits over a Mashburn. The Mashburn is designed to take the long 160+ weight Bullets and not require them being seated below the shoulder/neck junction. The STW in a 3.6" box will require the longer 7mm bullets to be seated further into the powder area negating the actual space in the case. Not having specific data isn't a huge detriment to me since 7mm WBY data usually gives a decent place to start. If you want to buy straight off the shelf brass the STW is probably the way to roll.
The STW is so close to the Mashburn it's hard to tell them apart. The Mashburn is a better design due to the bullet seating that SJB mentions above. Powder charges are slightly lighter for the Mashburn.
The STW is not really "new" because people had designed and built rifles for various 7mm magnums on full length, blown out 300 H&H cases a long time before Layne Simpson decided to nck down the 8 Rem Mag case. Even Art Mashburn designed one;and Bob Hagel did work with the 7mm/300 Weatherby. Both found the cases less efficient than the Mashburn Super.
After you've played with about every 7mm magnum you go to the Mashburn because you want to; not because it will do anything that other 7mm magnums of similar capacity won't do. It won't.
OTOH stick them both in 24" barrels you will never tell them apart, at the chronograph or on animals.
The STW is of course an easier bet than the Mashburn, but when I built my Mashburn Super I had already played with the STW and did not want another one.
Practically speaking you could work on your 7 rem Mag and never miss a beat. Great cartridge.
Unless you are simply enchanted with obscure wildcats, there is little reason to burden yourself with the wildcat cartridge.
The STW is not really "new" because people had designed and built rifles for various 7mm magnums on full length, blown out 300 H&H cases a long time before Layne Simpson decided to nck down the 8 Rem Mag case. Even Art Mashburn designed one;and Bob Hagel did work with the 7mm/300 Weatherby. Both found the cases less efficient than the Mashburn Super.
After you've played with about every 7mm magnum you go to the Mashburn because you want to; not because it will do anything that other 7mm magnums of similar capacity won't do. It won't.
OTOH stick them both in 24" barrels you will never tell them apart, at the chronograph or on animals.
The STW is of course an easier bet than the Mashburn, but when I built my Mashburn Super I had already played with the STW and did not want another one.
Practically speaking you could work on your 7 rem Mag and never miss a beat. Great cartridge.
Unless you are simply enchanted with obscure wildcats, there is little reason to burden yourself with the wildcat cartridge.
- Thread starter
- #31
LifeAndLiberty
Beginner
- Dec 20, 2015
- 59
- 0
It looks like 28 Nosler is actually an easier conversion for me. My rem mag came in and the detachable magazine doesn't give me the room to go any larger than the 28 Nosler in length.
