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Post by Encore64 on Jun 15, 2023 9:25:08 GMT -5
That works too. But the chamber casting is something you can record the data to use as a reference. I'd do both,, but hey,, I have plenty of Cerrosafe! Agreed, both will supply the same data. The trick is once you have fireformed cases, do not set the shoulder back when resizing.
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Post by bigbrowndog on Jun 15, 2023 9:32:46 GMT -5
Once you have a process sorted out, if the gun shoots exceptionally I’d have a set of dies set up for the gun. If the gun only shoots ok then check on return and refund from maker. Many problem children are sent down the road to become other people problems, I’ve never cared for that behavior, to me it’s underhanded. I had a Savage 99 in 300sav, I had to make brass for from 308win due to excessive headspace. The gun shot well and when it sold the dies went with the gun as well as the reason for them. I just kept brass and dies separately from my other 300sav gun.
Trapr
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Post by bradshaw on Jun 15, 2023 11:02:01 GMT -5
A note on Thompson/Center Contender barrels made by T/C in Rochester, New Hampshire: FREEBORE is standard operating procedure. It may not be possible to seat a bullet far enough out to stop against the LEADE (ramp of rifling LANDS). A shell which prevents full lockup prevents hammer fall at trigger squeeze.
As for the posed question, I haven’t experienced excess headspace with original Contender barrels. Some sketchy drilling & rifling, yes, but not excess headspace. Doesn’t mean it hasn’t happened. As Huey infers, it helps to define terms. Without naming a cartridge, how do we define “headspace?" Is the excess headspace for a rimmed or rimless cartridge? David Bradshaw
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Post by Encore64 on Jun 15, 2023 11:09:53 GMT -5
The TC Factory 35 Remington Barrels suffered from this issue. I honestly think the barrels were made correctly and the problem was the brass.
We used to load with Unique and a 158 grn 357 Mag bullet seated into the lands to fireform the brass. Then just avoid pushing the neck back during sizing.
Some guys seated the bullets backwards due to the lands being freebored as David describes.
This worked with the TCU Cartridges too. Required the heaviest for caliber bullets to reach the lands...
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Post by handloadingnotes on Jun 15, 2023 15:30:13 GMT -5
”Fireform” some cases that take out the excessive head space, per say. And then keep a dedicated sizing die and brass for that gun/cartridge? That's what I'd do — fireform brass to fit (lots of good suggestions in this thread), then neck size only, and have a well marked box to keep your 223/Contender "wildcat" cases in that are now married to the barrel. A Lee Collet .223 Neck Sizer Die is only $23 on Midwayusa right now, and with some patience I'm sure you can get a good deal on a second .223 die. There's always a danger a project like this sprawls, but .223 dies are available, and picking up a body and neck die in that caliber feels like a purchase you might use down the road in a different gun. It's just such a popular caliber. Who knows, the extra headspace might make it an accidentally-improved cartridge
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Post by leftysixgun on Jun 15, 2023 15:47:18 GMT -5
”Fireform” some cases that take out the excessive head space, per say. And then keep a dedicated sizing die and brass for that gun/cartridge? That's what I'd do — fireform brass to fit (lots of good suggestions in this thread), then neck size only, and have a well marked box to keep your 223/Contender "wildcat" cases in that are now married to the barrel. A Lee Collet .223 Neck Sizer Die is only $23 on Midwayusa right now, and with some patience I'm sure you can get a good deal on a second .223 die. There's always a danger a project like this sprawls, but .223 dies are available, and picking up a body and neck die in that caliber feels like a purchase you might use down the road in a different gun. It's just such a popular caliber. Who knows, the extra headspace might make it an accidentally-improved cartridge Luckily I have some other 223 dies.
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Post by leftysixgun on Jun 15, 2023 17:04:53 GMT -5
Right now its a pain in the ass!
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