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Post by mountainam on Jan 20, 2012 8:59:54 GMT -5
For those of you who are squeamish about using small rifle OR even large rifle primers on your new custom CF builds, you may have another option. .50BMG primers.
I just found a machinist out of Dallas, Pa that is selling a primer pocket uniformer on Ebay that is double ended and equipped with a stop for use in a battery drill. It's BY FAR the best design that I've seen.
I wish I wasn't so inept with my computer skills so I could link to it. I found it by typing in "primer pocket uniformer" and there it was. He has them displayed on our American Flag. If someone can put up a picture for the guys, it would be appreciated.
This may solve the the quandry for the guys that don't think the LRP has enough flame for their rifle. The .50BMG primer measures .311" IIRC, so there should be enough "meat" on the head of a .473" casing to modify them.
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Post by mountainam on Jan 20, 2012 9:01:41 GMT -5
Now that I think about it, perhaps the Moderators should move this to the "BUILD" section. Sorry guys.
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Post by jray57 on Jan 20, 2012 9:35:31 GMT -5
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Post by mountainam on Jan 20, 2012 10:13:06 GMT -5
That's it! Thanks jray.
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Post by rossman40 on Jan 20, 2012 11:07:32 GMT -5
That is interesting,, but a few things come up in my mind. You cut your brass to take the .50BMG primer, what are you going to use to install the primer? For those of us that have made the mistake of using a small primer anvil to install large primers we know what can happen. So you would have to at least modify a shell holder, maybe even a priming tool. Mil-spec .50BMG primers are pretty hard, does a Savage or Remmy CF firing pin have enough a$$ to set one off? If it does set it off will it be consistent? I have seen light firing pin strikes on a regular primer give inconsistent ignition. Would the firing pin have to be a larger diameter? How much of a gain would it be over a Large Rifle Magnum primer? I'm not trying to rain on the parade, just thinking a few steps ahead. The use of a cartridge case as a ML ignition system is patented. The guy that builds the Ultimate rifles patented it 12 years ago. That is why Bad Bull had to change their system. Here is the patent, www.freepatentsonline.com/6385887.pdf |
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Post by edge on Jan 20, 2012 11:17:35 GMT -5
That tool does not appear to have a pilot so I think you would need to use it in a lathe.
Actually the web thickness on the case is probably a bit thin,I think the BMG primer pocket is .224 deep!
edge.
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Post by mountainam on Jan 20, 2012 11:58:03 GMT -5
The depth of the primer is the only dimension that I don't know. If in fact it's .224" as Edge indicated then my best guess is that it would be more than a .473" case head will handle. As far as how much more power? You'd think there would be some, maybe too Much. I wish I could find an article that I read a year or so ago that stated that the only difference between a srp and lrp in Mag strengths is the diameter. I set all my stuff off with small rifle primers and DO switch to Mags when there is single digit temps. I have yet to experience a problem. But others insist that they aren't enough. I just thought maybe those fellows (Jeff Hankins) that just came up with that new priming module may be able to employ the .50BMG primer in their new design as an option.
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Post by Richard on Jan 20, 2012 17:49:44 GMT -5
Answer this: Why would I be squeamish using a small or large rifle primer on my new custom CF build? I have built many CF rifles for both long and short benchrest plus hunting and have never been squeamish about my primer? Cartridges like .30/378 Whby. mag. and .408 Chi-Tec use only large mag. primers? Why in the world would you want to use a .50 BMG primer to ignite a load that only needs a small or large rifle primer? You have lost me on your reasoning?
Sorry?
Richard
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Post by deadeye on Jan 20, 2012 18:11:07 GMT -5
edge is correct on .224 deep,just measured mine to make sure,are you aware what 50bmg primers cost? its been a few yrs since i ordered but at that time $ 168.00 per 1k just something to think about
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Post by mountainam on Jan 20, 2012 19:14:51 GMT -5
Richard, I see I wasn't clear. More proof reading necessary I guess. I was referring to a custom ML build using a CF action. I hear from a lot of fellows that are squeamish to use anything other than shotgun primers. Someone did ask me about using a .50 BMG primer for a SML, but I don't recall who.
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Deleted Member
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Post by Deleted on Jan 21, 2012 18:50:16 GMT -5
upon looking at that tool it is designed to cut the bottom only and not to cut a hole larger. there are no relief cuts on the sides.
when i do my cf build i will have no second thoughts about using lrmp. i think the magnum primers will have plenty of fire to ignite anything we are shooting...
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