The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Wildcats And Their Development How much can you widen a case?Go | New | Find | Notify | Tools | Reply | |
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If you wanted to widen a case via fire forming, how much is safe? 3, 5, 10 thou? Could you take say a 9,3x62 case that measures .474" to say .480"? 577 BME 3"500 KILL ALL 358 GREMLIN 404-375 *we band of 45-70ers* (Founder) Single Shot Shooters Society S.S.S.S. (Founder) | ||
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Boom I've taken factory 280 rem brass to my 416. Shoulder moves forward and out to .46. Going all the way to 416 is not 100% success but better than 75% for sure. If you are talking about blowing out the web so it looks like a 284 I have no clue. As usual just my $.02 Paul K | |||
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A case can be expanded more than you think!  | |||
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The Dane has some interesting carts there  I was thinking about the case head or the base of the case by the rim. A 15 thou wider case than the 06 by blowing out the 9,3x62 a bit. 577 BME 3"500 KILL ALL 358 GREMLIN 404-375 *we band of 45-70ers* (Founder) Single Shot Shooters Society S.S.S.S. (Founder) | |||
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Extracting that case on the far right would be interesting.  NRA Endowment Life Member | |||
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Why. If it is your .423 would a mouth headspace not be easier? (I sure haven't checked dimensions) As usual just my $.02 Paul K | |||
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The one on the right is a modern version of a muzzle loader  | |||
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Or maybe a revolver with the loading gate in the front of the cylinder... TomP Our country, right or wrong. When right, to be kept right, when wrong to be put right. Carl Schurz (1829 - 1906) | |||
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I would say "zero" widening of the case head is the best recommendation for fire-forming a wildcat. Case head expansion is an ugly business. Now I will get back to studying the 6.5-06 Springfield to see if I can improve that any for the new bee in my bonnet, the "6.5mm Speedmoor." Nah ... the 6.5-06 is good enough.  How about a .264/.338 Lapua Magnum? ... "6.5mm Needmore Speedmoor."  | |||
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How about the just now come up with 6.5 valkyrie!!! (A slightly blown out 6.5-376 Steyr) Just rechamber a 6.5x284 and open the boltface a bit to get 20 percent more capacity over 6.5x284
577 BME 3"500 KILL ALL 358 GREMLIN 404-375 *we band of 45-70ers* (Founder) Single Shot Shooters Society S.S.S.S. (Founder) | |||
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I remember a member here doing a 375H+H case to 404 Jeffery, the base stayed the same while the body expanded to fit. How it stayed square to the bolt face, I don't know or uneerstand, but it worked without case splits or headspace problems. So yes, a case can be safely expanded far more than you think and still remain a safe product. Cheers. | |||
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Yep http://forums.accuratereloadin...781041491#7781041491 As usual just my $.02 Paul K | |||
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Heres one i actually did myself (the other pic i stole of the web) Since the rim is missing i suspect that the original man lathe turned a form for the shoulder and expanded the living crap out of a /many!) case. I annealed a case (several!!!) and spun them in the lathe to get a controlled and even/not lobsided result. I got to a .40 caliber bullet in first try but from there the learning curve is like a hockey stick! Here is a .44 bullet in a 357MAG case.  I will go for a .45 caliber bullet just for the heck of it, but the "necks" tend to "grain up" and will develop splits. | |||
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Come to think of/look at it i think he did a .45 om a 30 carbine and that makes it way cooler than my feeble attempt!!! I may be down but i'm not defeated yet. | |||
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I believe boom stick is asking about expanding the base diameter. Matt FISH!! Heed the words of Winston Smith in Orwell's 1984: "Every record has been destroyed or falsified, every book rewritten, every picture has been repainted, every statue and street building has been renamed, every date has been altered. And the process is continuing day by day and minute by minute. History has stopped. Nothing exists except an endless present in which the Party is always right." | |||
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Yup 577 BME 3"500 KILL ALL 358 GREMLIN 404-375 *we band of 45-70ers* (Founder) Single Shot Shooters Society S.S.S.S. (Founder) | |||
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I've turned multiple thousands of 9mm Luger into 9x18 Makarov. Tends to blow the case out noticably forward of the web. Never any problems... but then 95 grains of cast bullet over 4.0 grains of Unique is not exactly in belted magnum territory either. Porosonik. Vetting voters= racist. Vetting gun buyers= not racist. Got it? | |||
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Here is the proper way to do a case head expansion when wildcatting, like turning the 6.5-06 A-Square  http://ammoguide.com/?catid=184 into the 6.5 Prometheus:  http://ammoguide.com/?catid=858 Both of the above cartridges use 2.5" brass. You use a shortened .338 Lapua Magnum (AKA .338 Norma Magnum) to make 6.5 Prometheus. You cannot make it from 30-06 Springfield brass.  | |||
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Apples and oranges. Boom stick is talking about a few thou to allow the use of the most common brass, and bolt face. Matt FISH!! Heed the words of Winston Smith in Orwell's 1984: "Every record has been destroyed or falsified, every book rewritten, every picture has been repainted, every statue and street building has been renamed, every date has been altered. And the process is continuing day by day and minute by minute. History has stopped. Nothing exists except an endless present in which the Party is always right." | |||
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So how do you expand the head?  As usual just my $.02 Paul K | |||
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Fireform cream of wheat method. Matt FISH!! Heed the words of Winston Smith in Orwell's 1984: "Every record has been destroyed or falsified, every book rewritten, every picture has been repainted, every statue and street building has been renamed, every date has been altered. And the process is continuing day by day and minute by minute. History has stopped. Nothing exists except an endless present in which the Party is always right." | |||
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You cant expand the head of a case! But you can do as the fellow with the 404. If it were me i would lathe turn some small plastic rings to center the case head in the chamber for initial fireforming. That would produce a case like the one on the left.  | |||
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+1 opinions vary band of bubbas and STC hunting Club Information on Ammoguide about the416AR, 458AR, 470AR, 500AR What is an AR round? Case Drawings 416-458-470AR and 500AR. 476AR, http://www.weaponsmith.com | |||
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That expands in front of the web but does nothing for the head. If the head needs to be expanded for his bolt I have no clue how unless you swage it somehow. Plus you expand the head good luck keeping primers in it.  Maybe I need a  As usual just my $.02 Paul K | |||
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I will opend a case neck to the size of the case, and I would never mess with the case head, that's just dangerous and unreasonable. Ray Atkinson Atkinson Hunting Adventures 10 Ward Lane, Filer, Idaho, 83328 208-731-4120 rayatkinsonhunting@gmail.com | |||
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As a young reloader I made and used 06 cases to make Jap. 7.7 cases. In front of the web and head there was about .009" expansion.I probably did less than 50 and most likely didn't use any more than 3 times but only because I had other guns to play with.Old age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone.. | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Wildcats And Their Development How much can you widen a case?
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