7mm WSM brass
- Thread starter Smokinyotes
- Start date
No sure is it's a dying cartridge or not. Most any brass has been hard to come by for a while now although it looks like things are slowly getting better. I loaded up on 7 WSM brass a couple of years ago and it's a good thing, I haven't seen much, if any, since.
Some people are paranoid and will only use brass with the proper headstamp. Cartridge conversions are viewed as utter heresy by some.
I do it for various cartridges but have run into a lot of people who think it's complete suicide to do so and I'm going to die from it.
I understand the reasoning here, some people are OCD as well which may have something to do with that. Although, the 7WSM will not chamber in a 300WSM, the headspacing is longer on the 7WSM by design.
Chinbullco
Regular
- Location
- NW Alberta
Its a dead cartridge, no longer chambered by any major rifle manufacturer. I have one and love its accuracy. Its chambered in a custom 17 lb 1000 yd BR rifle. I have brass supply to last this barrel but don't know if I'll use the reamer again.
Should be fairly easy to neck down annealed 300WSM in a 7WSM die and carefully adjust sizing depth to a point where you can feel bolt close on false shoulder. I would recommend some care be taken to determine if case necks need outside turning. Annealing properly is the issue. I use 300WSM to make a long-necked 25-SAUM, requires moving shoulder back and necking down. This is done in one step using a FL RCBS 25WSSM die adjusted to proper length. I realize the necking down and moving shoulder back isn't the same as creating a ridge on a case mouth and fire-forming shoulder forward to fill chamber. Annealing neck and shoulder area is critical, needs to be done right. If using 270 WSM brass I would recommend you neck up to 300 WSM then down to 7mm.
Should be fairly easy to neck down annealed 300WSM in a 7WSM die and carefully adjust sizing depth to a point where you can feel bolt close on false shoulder. I would recommend some care be taken to determine if case necks need outside turning. Annealing properly is the issue. I use 300WSM to make a long-necked 25-SAUM, requires moving shoulder back and necking down. This is done in one step using a FL RCBS 25WSSM die adjusted to proper length. I realize the necking down and moving shoulder back isn't the same as creating a ridge on a case mouth and fire-forming shoulder forward to fill chamber. Annealing neck and shoulder area is critical, needs to be done right. If using 270 WSM brass I would recommend you neck up to 300 WSM then down to 7mm.
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