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Posted: 4/18/2010 11:37:26 AM EST
dibs on your guns and ammo
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Posted: 4/18/2010 11:46:55 AM EST
Some brass over the years has been made w/ both large and small primers, but I don't know why you would want to try this, even if you have a shit load of large rifle, where are going to get load data?
Not to mention the safety aspect. I would suggest not doing this. |
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Posted: 4/18/2010 12:05:13 PM EST
Suggest that you find someone in your area that would be willing to swap small primers for large, even if you had to add a couple of bucks would be worth it.
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Posted: 4/18/2010 12:34:58 PM EST
Quoted:
dibs on your guns and ammo Dibs on his reloading supplies and equipment and storage containers as well. 
Honestly I have never heard of anyone doing this, offhand I wouldn't think that would be a very wise idea, not to mention the problem of finding load data.I would also think that the case life would be severly shortened as well. |
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Posted: 4/18/2010 12:48:41 PM EST
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Posted: 4/18/2010 1:16:12 PM EST
bench rest shooter claim to get better accuracy with small rifle primer brass versus magnum or large rifle primed brass
so why want to convert the brass why not just sell some of the LR primers or hord them like other people do have an abundance of LR primers? to much time on your hands? over thinking things again? please do tell inquiring minds want to know |
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Posted: 4/18/2010 3:26:27 PM EST
Quoted:
Would there be any safety risk of converting small rifle primer brass to use large rifle primers? I mean, if headspace were correct, the primer cup couldn't go anywhere, and 52Kpsi against a large cup shouldn't be any different than against a small cup, right? If it would be do-able, does any company make a large rifle size drill bit or reamer that would work? I don't think the standard reloading reamer would be up to the challenge. Thanks for any opinions in advance. Suppose you can "safely" do this. My God man, how much is your time and your trouble worth?!?! Brass is cheap and available, what you are proposing is labor intensive w/o the safety issue. I let the manufacture's establish the primer size and simply work with it. |
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Posted: 4/18/2010 3:33:40 PM EST
 
 ??
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Posted: 4/18/2010 3:56:01 PM EST
I wouldn't fuck around like that.
Just get the right brass and/or primers and be done with it. |
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Posted: 4/18/2010 4:08:35 PM EST
The large primer is not only larger in diameter, it's longer. That means the web will be thinned; review the effect of that on FC cases that use small primers.
There might be some structural problems around the perimeter between the edge of the pocket and the extractor rim and case walls, but that depends on the details of the diameters and other geometry. Can't say I think it's a good idea. Nope, not a single reason to perform that mod. |
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Posted: 4/19/2010 6:13:13 AM EST
That would be removing a lot of material from the case head. I would think that it would weaken it greatly.
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Posted: 4/19/2010 6:42:26 AM EST
Please tell us why you want to do this?
Caliber and gun? Another thumbs down from me. Anyway, welcome to Arfcom. 
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Posted: 4/19/2010 9:14:08 AM EST
It is seriously not worth the time or effort......or the safety risk.
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Posted: 4/19/2010 3:07:21 PM EST
If you remove material to enlarge the primer cup, you have weakened the structure of the case head, particularly in the radial direction at a point where it is unsupported by the chamber. Inserted primer cups do not restore any radial strength to the case head. So, by modifying the case structure you have reduced the safety margin, for the same powder load and bullet.
Take a look at LazyEngineer's photos on another thread here. Those bulged case heads are a clue for you to study. |
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Posted: 4/19/2010 4:20:08 PM EST
Hell, go for it. Sometimes natural selection needs a little help.
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Posted: 4/19/2010 7:11:30 PM EST
NO
Even the most expensive brass around would be darn cheep compared to the time you would invest in doing this conversion. Financial end of this deal aside I doubt most cases made for small primers would have much strength left after you drilled or reamed them out |
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