mikecr ........ +1
Swage press to tighten primer pockets
- Thread starter DanConzo
- Start date
Jeff,
Your idea may spark a few more good ideas. That's how great products are invented. I like your concept of using a die supporting the case and using a ram (instead of a hammer). If this perfected tool was simple, someone else might have come up with it by now. It sounds like you have the required tools. I built (4) expensive prototypes before my collet die was 100% completed. Keep working on it. There are a lot of interested shooters out there.
Your idea may spark a few more good ideas. That's how great products are invented. I like your concept of using a die supporting the case and using a ram (instead of a hammer). If this perfected tool was simple, someone else might have come up with it by now. It sounds like you have the required tools. I built (4) expensive prototypes before my collet die was 100% completed. Keep working on it. There are a lot of interested shooters out there.
Your right there Inno, I believe that being able to produce brass and bullets that do not have any variation is one of the important parts in getting the groups a shrinking at long range .. This pic is of a target shot during a registered 1000yd bench match in Australia .. If i did not suck at reading wind it could have been my best ever .. The 7Xs go 2.7ins ,pity about the others hey....Jr.. Jeff Rogers
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aJR--Thanks again, I think I completely undestand your system -you just push the lubed case thru the die and 1/2" long taper from 15mm (.590") to 13.373 mm (.5265") with the 1/2" push rod which attaches to the press ram. I understand that this is just for one particular case and you have other dies with different tapers for other cases. Do you use a regular reloading press or do you have a certain press just to do these strong arm jobs? That's still good shooting Roger you'll get the 100-10x eventually. I shoot the same game for 40 years. If those 10 cases went thru your swage die it sure didn't force the head out of the centerline of the cases or do any other harm.
The system as described sounds pretty good, but I also wanted to throw another idea out there to see what others think.
Just looking at a cross-sectional drawing of a bottle neck case, it seems like a device that works like a neck crimp but which works in that narrow space where the extraction grove might also do the trick. The crimp will not narrow the complete primer pocket but would put a narrow crimp approximately in the middle of the primer pocket which I think would be more than adequate to hold the primers in safely. The device could be pretty simple with four moveable segment which would be held in a hinged race and would crimp in from the four directions when the race was pressed together.
Just looking at a cross-sectional drawing of a bottle neck case, it seems like a device that works like a neck crimp but which works in that narrow space where the extraction grove might also do the trick. The crimp will not narrow the complete primer pocket but would put a narrow crimp approximately in the middle of the primer pocket which I think would be more than adequate to hold the primers in safely. The device could be pretty simple with four moveable segment which would be held in a hinged race and would crimp in from the four directions when the race was pressed together.
I could be wrong, but my bet is that you would deform the rim of any case before getting enough compression on the case head.
It’s possible, but you are going to have to deform that area regardless of whether it is the whole case head area or just the extraction grove to reduce the diameter of the primer pocket.
The advantage of just crimping the extractor grove area is that you are actually closer to the primer pocket (i.e. it is a thinner area) than say if you squeezing the rim. The potential problem associated would of course be dependent on the quality of the crimp i.e. how uniform you squeeze. The other thing to keep in mind is that the amount you need to compress is very little i.e. less than one thousands.
Regardless, no one can tell how well this would work until they give it a try…
The advantage of just crimping the extractor grove area is that you are actually closer to the primer pocket (i.e. it is a thinner area) than say if you squeezing the rim. The potential problem associated would of course be dependent on the quality of the crimp i.e. how uniform you squeeze. The other thing to keep in mind is that the amount you need to compress is very little i.e. less than one thousands.
Regardless, no one can tell how well this would work until they give it a try…
It seems that CH Tool & Die Co out of Ohio make Case Head Swage Dies. Just google it and you'll find it. I don't know all the particulars yet but I do know that most heads on rimless cases can be swaged in the Rockchucker Presses so I'm told. I have used their dies and their case trimmer for years and they are very good tools. Hopefully we'll get all the specs etc soon.
killahog--If you call or go down talk to Dave, he is the tech guy, he said he has several dies ready to be hardened for the 30-06 head size. They also supply the pusher and you screw the die (which has a taper inside) in the press and lock it when you get the desired squeeze without pushing the case thru then knock (tap) the case down and out with a rod or dowel. It wasn't made to really tighten the primer pocket but it may well do it. If you get one and try it with cases with loose primer pockets please let us know if it works. Thanks
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