Got you. No offense taken. Im neck deep swimming in that phase.
I recommend the nitride die, When I say I feel the difference its just a "slight more resistance" and its probably non affecting. I just havent tested.
- Thread starter SlowMiss6.5
- Start date
I recommend the nitride die, When I say I feel the difference its just a "slight more resistance" and its probably non affecting. I just havent tested.
Unless I'm missing them on their site, they have one nitride mandrel per caliber set at caliber diameter. So, no manipulation of NT with smaller sizes.
You can do that with bushings from the outside. The OD will influence the outcome post mandrel.
So you are running the brass thru a sizing die twice? Once to squeeze the neck down to where a mandrel will touch the inside of the neck and again to set neck tension with a bushing?
No.
What I’m saying is you don’t need to have .0005” increment mandrels. Your bushing size will have an effect on your post mandrel size.
Once into the busing. Once over the mandrel. Done.
How so?
Just change your lube make up and then you can clean it off with warm water and dry em and be done.
I use 99% alcohol and rcbs lube mixed just like you do with lanolin. The rcbs is water based so it will come right off with water and works really really well sprayed when dissolved in 99%alcohol. This is the way.
This makes sense - I've found the same when I don't fully wash off the cleaning solution I use in my ultrasonic. But now I've found the joy of dipping cases in Neo Lube #2.
The more you expand, the more it will tend to spring back. In other words, if you use a smaller bushing, the brass will tend to spring back more after using the mandrel.
Isn't that the point of annealing? To prevent that springback?
I just ran Hornady 6.5 Grendel brass thru a 6.5G die without an expander, a 6BR die, and then a 6.5G bushing die with a .248 bushing and they're coming out at .247 OD on Mitituyo calipers. I ran them thru a Sinclair mandrel to .248, annealed, and then thru a Hornady 22 ARC die to a final size of .250. Loaded neck is .252. Where's the springback?
It seems like to plan on a specific amount springback is a sketchy plan.
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I know AMP says there is no springback. However, springback is caused by brass elasticity. You have to maintain some elasticity to hold the bullet in place. If you don't have any elasticity, the bullet will simply push the brass out of the way and there will be no force holding it in. Annealing certainly reduces springback, but it does not eliminate it - unless you over-anneal, which ruins the brass.
Try this:
Run the mandrel through a piece of brass twice. It reengages the second time. If there was no springback, it wouldn't engage at all after the first.
On the surface, I would tend to agree, but I don't use this process so can't comment on its effectiveness. I use a bushing as close to the mandrel size as possible that still enables the brass to engage the mandrel each time.
If you size with a smaller bushing, you’ll get a smaller ID after your mandrel than if you size with a larger bushing.
@Haney is still stalking me.
It just seems like every brand/ type of brass wont springback the same way. The most predictable way to produce a prepped case with the desired neck tension is to use a bushing or mandrel sized appropriately. Most of the time you buy a .248 bushing to produce .248 diameter necks. This keeps you from buying 3 experimental bushings for each die set bc there's no predictable way to oversize for a "springback-mandrel" final size. I could see tho if you're using this springback mandrel technique where you would have to anneal every firing to keep springback as consistent as possible.
The point was, you don’t need mandrels in .0005” increments.
If you anneal, anneal every firing, regardless of sizing methods.
If you anneal, anneal every firing, regardless of sizing methods.
Wash your weenie how you want. People are succeful doing it every time, sometimes, and not at all.
I don't think anyone said they need them in .0005" increments. But yes, I know you're just being dramatic to make your point.
Fred mentioned sizes. 21st Centutry offers other mandrels in .0005” increments. No dramatics. It was a simple answer to a simple question.
