Fireforming 270 Weatherby Magnum
- Thread starter tomL
- Start date
I just buy Wby brass. Spendy, but that way I don't mix it up between various rifles. If you own no other Wby's you should be ok though. - dan
Innovative
Regular
- Location
- Casselberry, Florida
TomL .......
It won't work very well, because your case necks will be too short. Here's a picture of a 300 Win Mag round that was accidentally fired in a 300 Weatherby Magnum. The 7mm won't be quite this short, but it's better to use the right cases. Just be sure to load them so that they will last a lot longer.
If you want to get the longest case life and the best accuracy from your brass, read the homepage and the Tech Tips section on our website.
- Innovative
It won't work very well, because your case necks will be too short. Here's a picture of a 300 Win Mag round that was accidentally fired in a 300 Weatherby Magnum. The 7mm won't be quite this short, but it's better to use the right cases. Just be sure to load them so that they will last a lot longer.
If you want to get the longest case life and the best accuracy from your brass, read the homepage and the Tech Tips section on our website.
- Innovative
Innovative
Regular
- Location
- Casselberry, Florida
25tikka .....
You're right about the 270wby and 257wby, they are much shorter than the 300 wby. However, the 7mm Rem. case is .045" shorter than the .270 Wby. Magnum.
- Innovative
You're right about the 270wby and 257wby, they are much shorter than the 300 wby. However, the 7mm Rem. case is .045" shorter than the .270 Wby. Magnum.
- Innovative
john-brennan
CGN frequent flyer
- Location
- Vancouver Island B.C.
7mm
7MM RM new brass works fine for what he is doing, run the new brass through your re-sizing die and you are ready to go. As stated the neck is shorter on the 7mm brass so you will not need to trim for a couple of shots. I use the WW 7mm RM brass in my .257 weatherby and find it more accurate than when I tried factory brass reloaded.
7MM RM new brass works fine for what he is doing, run the new brass through your re-sizing die and you are ready to go. As stated the neck is shorter on the 7mm brass so you will not need to trim for a couple of shots. I use the WW 7mm RM brass in my .257 weatherby and find it more accurate than when I tried factory brass reloaded.
- Location
- Calgary, AB
When I had my .270Wby, I used 7mmRM brass and had no issues. Just FL size and once you fire it, the shoulder will form and you are good to go.
Innovative
Regular
- Location
- Casselberry, Florida
Forming 7mm Rem cases to fit a 270 Wby (or a 257 Wby) can be done, and it will work with no safety issues. I'm sure the brass is cheaper too.
However, the necks will be .045" shorter, and that procedure just doesn't interest me. I'd rather have a little more case neck for better bullet tension, and use correctly labeled handloads. It's not that hard to get up to 20 handloads from belted magnum cases.
- Innovative
However, the necks will be .045" shorter, and that procedure just doesn't interest me. I'd rather have a little more case neck for better bullet tension, and use correctly labeled handloads. It's not that hard to get up to 20 handloads from belted magnum cases.
- Innovative
Roger that!
Innovative
Regular
- Location
- Casselberry, Florida
If your case necks are .045" shorter than they should be, that missing portion of case neck will provide less bullet contact. To a carpenter .045" is almost nothing. However, in handloading .045" can be a pretty big deal. It's so easy to get it exactly right. Why make handloading so difficult?
- Innovative
- Innovative
john-brennan
CGN frequent flyer
- Location
- Vancouver Island B.C.
7mm
Your the only one making hanloading difficult here, some of us have been doing this for alot of years and know what we are talking about so if you don't want to do it this way fine you did not ask the original question so you can pay 3x the cost for Norma or Weatherby brass the rest of us won't.
Your the only one making hanloading difficult here, some of us have been doing this for alot of years and know what we are talking about so if you don't want to do it this way fine you did not ask the original question so you can pay 3x the cost for Norma or Weatherby brass the rest of us won't.
Innovative, you have a website for handloaders, but I am wondering if you have ever reloaded for the 270 Wby?
I use both factory and resized 7mm brass, and, if anything, my 270 Wby shoots groups that are slightly smaller when loaded with reformed 7mm Rem Mag brass. Have always attributed that to the slightly thicker neck of the reformed case being a tighter fit in the chamber neck.
My experience is exactly the same with 7mm reformed to 257 Wby; slightly smaller groups.
This is all moot anyway, since the slight difference means beans when out hunting.
Ted
I use both factory and resized 7mm brass, and, if anything, my 270 Wby shoots groups that are slightly smaller when loaded with reformed 7mm Rem Mag brass. Have always attributed that to the slightly thicker neck of the reformed case being a tighter fit in the chamber neck.
My experience is exactly the same with 7mm reformed to 257 Wby; slightly smaller groups.
This is all moot anyway, since the slight difference means beans when out hunting.
Ted
- Location
- Calgary, AB
Well said Ted. Been done many times, and no issues whatsoever.
Innovative
Regular
- Location
- Casselberry, Florida
Ted ........
I've loaded well over 2 dozen different calibers (over the last 40 years), but never the 270 Wby. You're right, the .045" of missing case neck is no big deal when hunting. I'm just mentioning the fact that it's not exactly right, and that will be important to some shooters.
On the other hand, using 7mm brass is a whole lot cheaper. As you mentioned the extra neck "thickness" could be another advantage, as long as your particular chamber isn't too tight. Trust me ..... few shooters know how to accurately measure neck clearance in their particular chamber.
If you're looking for interesting facts, here are a few that are advantages for using 7mm brass. Factory loads headspace on the belt, and handloads need to headspace on the shoulder. The first firing of any belted case stretches the case considerably, and the 7mm Rem Mag has a longer body. That means that if you use NEW 7mm Mag cases, the shoulder on your first reload won't need to be blown as far forward (causing "case stretch") as much as the 270 Wby brass. That depends on the ability of the shooter to control headspace accurately when resizing. Measuring is required.
Having worked directly with hundreds of shooters, and having designed firearms and reloading equipment, I've found that many common handloading problems can be avoided completely. It's good to make decisions based on all the facts. It never hurts to learn a little more. Some shooters would like to know all of the facts (the good and the bad) before making decisions.
- Innovative
I've loaded well over 2 dozen different calibers (over the last 40 years), but never the 270 Wby. You're right, the .045" of missing case neck is no big deal when hunting. I'm just mentioning the fact that it's not exactly right, and that will be important to some shooters.
On the other hand, using 7mm brass is a whole lot cheaper. As you mentioned the extra neck "thickness" could be another advantage, as long as your particular chamber isn't too tight. Trust me ..... few shooters know how to accurately measure neck clearance in their particular chamber.
If you're looking for interesting facts, here are a few that are advantages for using 7mm brass. Factory loads headspace on the belt, and handloads need to headspace on the shoulder. The first firing of any belted case stretches the case considerably, and the 7mm Rem Mag has a longer body. That means that if you use NEW 7mm Mag cases, the shoulder on your first reload won't need to be blown as far forward (causing "case stretch") as much as the 270 Wby brass. That depends on the ability of the shooter to control headspace accurately when resizing. Measuring is required.
Having worked directly with hundreds of shooters, and having designed firearms and reloading equipment, I've found that many common handloading problems can be avoided completely. It's good to make decisions based on all the facts. It never hurts to learn a little more. Some shooters would like to know all of the facts (the good and the bad) before making decisions.
- Innovative
Roger that. I always resize 7mm brass so that the bolt will just barely close on the case. As you well know, that gives perfect headspace, and if one uses neck sizing after that first firing, case life is wonderful.
BTW, as far as you having designed firearms and reloading equipment, a friend of mine up here bought your collet die for resizing belted cases, and it works great! Everyone who reloads belted magnums should have one.
Good to see you here. Keep posting.
BTW, as far as you having designed firearms and reloading equipment, a friend of mine up here bought your collet die for resizing belted cases, and it works great! Everyone who reloads belted magnums should have one.
Good to see you here. Keep posting.
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