Tweet
Hi guys
In my previous post I was asking about how to size slightly undersize brass case necks. Just removing the sizing button ought to have worked but didn't. So I found another way of doing it that I've never heard anyone else use, so I thought I'd share it. However it occurs to me that many members that are reloading both common and uncommon calibres might also like to know how to make brass necks slightly bigger or smaller. So here's my experiences:
The 7x66 SE vom Hofe brass from the lot that I imported is just a little undersize. The neck thickness is 12-13 thou when other 7mm brass is more like 14 -17 thou, (measured on a RCBS Case-master). The RCBS dies for the 7x66SEvH will size 7x64 Brenneke brass, (so I don't think they're at fault here), but they wouldn't work on the thin 7x66SEvH brass. So I measured some sellotape, (what you call "Scotch tape" in the US/Canada and "sticky tape" in Australia). It's 2 thou thick, so I wrapped it around the case neck, trimmed off the excess and raised the case into the FL die. The sticky tape stayed on for the whole procedure for each case. The result was that now the properly sized necks securely grip a 7mm bullet, no trouble at all. It may be a bit slow, but now I can reload my very expensive and very hard to replace 1x fired cases. The tape comes off then, of course.
To make a case neck bigger, (i.e. the opposite problem), I use 2 thou thick Mylar tape. This isn't sticky and was purchased from Ballistic Products who make lots of great shotgun reloading stuff. It is very strong plastic card. I trim it down, make it into a small funnel and put into the case mouth. It stays in place while the sizing button passes through the neck each way and so makes the case neck 4 thou oversize, (i.e. 2+2 thou each side of the neck). If you've used a Stoney-Point or Hornady Over-All-Length tool, you'll know that you need to use a special factory prepared case with an oversize neck. This allows a bullet to just slip in the neck and so you can determine when it touches the lands. The Mylar trick works on any case, be they exotic ones that you can't buy from Hornady or even just the regular stuff, (e.g. .243, .308 etc.), that comes with their tool, if you forget to keep it separate from your fired cases and accidentally resize it. Without the Mylar, you'll need to buy another new modified case. Your Mylar stretched case, however, will be a custom fit if you neck-size it like this after it was previously fired in you chamber, be that .22 Hornet, 9,3x72R, 8x75RS or whatever!
In my previous post I was asking about how to size slightly undersize brass case necks. Just removing the sizing button ought to have worked but didn't. So I found another way of doing it that I've never heard anyone else use, so I thought I'd share it. However it occurs to me that many members that are reloading both common and uncommon calibres might also like to know how to make brass necks slightly bigger or smaller. So here's my experiences:
The 7x66 SE vom Hofe brass from the lot that I imported is just a little undersize. The neck thickness is 12-13 thou when other 7mm brass is more like 14 -17 thou, (measured on a RCBS Case-master). The RCBS dies for the 7x66SEvH will size 7x64 Brenneke brass, (so I don't think they're at fault here), but they wouldn't work on the thin 7x66SEvH brass. So I measured some sellotape, (what you call "Scotch tape" in the US/Canada and "sticky tape" in Australia). It's 2 thou thick, so I wrapped it around the case neck, trimmed off the excess and raised the case into the FL die. The sticky tape stayed on for the whole procedure for each case. The result was that now the properly sized necks securely grip a 7mm bullet, no trouble at all. It may be a bit slow, but now I can reload my very expensive and very hard to replace 1x fired cases. The tape comes off then, of course.
To make a case neck bigger, (i.e. the opposite problem), I use 2 thou thick Mylar tape. This isn't sticky and was purchased from Ballistic Products who make lots of great shotgun reloading stuff. It is very strong plastic card. I trim it down, make it into a small funnel and put into the case mouth. It stays in place while the sizing button passes through the neck each way and so makes the case neck 4 thou oversize, (i.e. 2+2 thou each side of the neck). If you've used a Stoney-Point or Hornady Over-All-Length tool, you'll know that you need to use a special factory prepared case with an oversize neck. This allows a bullet to just slip in the neck and so you can determine when it touches the lands. The Mylar trick works on any case, be they exotic ones that you can't buy from Hornady or even just the regular stuff, (e.g. .243, .308 etc.), that comes with their tool, if you forget to keep it separate from your fired cases and accidentally resize it. Without the Mylar, you'll need to buy another new modified case. Your Mylar stretched case, however, will be a custom fit if you neck-size it like this after it was previously fired in you chamber, be that .22 Hornet, 9,3x72R, 8x75RS or whatever!
Comment