Jim Watson
Member
Once upon a time, up until 1960, I have read, Winchester Super Match .300 H&H (also .30-06) was loaded with corrosive mercuric primers.
ETA. Found a picture.
ETA. Found a picture.
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Belted cartridges——is there really a difference with their accuracy
- Thread starter High Plains
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DM~
Member
Like you said, origional problem. That's LONG ago history, and hasn't existed in a long LONG time.
I have never experienced it with any of my DR's, any I have fired, nor have I seen it with anyone elses...
DM
Super information. That is great stuff with great pictures. I am hoping there are always belted magnums around just to remind us of our history and to let us know that just because something is modern doesn't necessarily make it good.
I had a gunsmith tell me that I wouldn't need to trim if I used a mandrel to expand my necks instead of the expander in a sizing die. Yeah, sure. Anyway, I trim every time simply to get all the cases the same length. Just because they start out even doesn't mean they stay that way. I do use a mandrel though because it is easier on the brass and has the potential for being straighter.
old heeler
Member
You can also use these expander mandrel.
http://www.xxicsi.com/caliber-specific-expander-mandrels.html
Thanks for the link. I'll keep it on hand. Stuff like that can be pretty handy.
Varminterror
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I’m surprised this thread is still getting bumped...
Something which keeps nagging at me - because it mimics my own experience - is to acknowledge that while 300wm was a popular LR heavy gun cartridge for some time, winning big matches and setting some records, it’s been out of favor for decades. Interesting, cartridges like the 300WSM still get some play - so a heavy 30 cal at magnum speeds remains viable, however, no one shooting magnum 30’s is still shooting a 300 win mag, but instead those shooters use the WSM. Logistically, a 300wm shooter is rolling along, starts noticing other cartridges beating them out, and they try something new... if the 300wm were superior to the new juice they tried, they’d have gone back to it, but there are real reasons why they did not go back. In that application, being good doesn’t really matter as much as being “best,”, and effectively, “if you’re not first, you’re last.” Those shooters aren’t going to use a cartridge they feel puts them at a disadvantage, so they don’t - and it’s not the 30 cal bullet at magnum speeds which causes the disadvantage, it’s the case.
Something which keeps nagging at me - because it mimics my own experience - is to acknowledge that while 300wm was a popular LR heavy gun cartridge for some time, winning big matches and setting some records, it’s been out of favor for decades. Interesting, cartridges like the 300WSM still get some play - so a heavy 30 cal at magnum speeds remains viable, however, no one shooting magnum 30’s is still shooting a 300 win mag, but instead those shooters use the WSM. Logistically, a 300wm shooter is rolling along, starts noticing other cartridges beating them out, and they try something new... if the 300wm were superior to the new juice they tried, they’d have gone back to it, but there are real reasons why they did not go back. In that application, being good doesn’t really matter as much as being “best,”, and effectively, “if you’re not first, you’re last.” Those shooters aren’t going to use a cartridge they feel puts them at a disadvantage, so they don’t - and it’s not the 30 cal bullet at magnum speeds which causes the disadvantage, it’s the case.
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