It seems to polish them smoother than the hammer-formed texture from the factory, if you do it in 4 steps ...

.416/350-grain TSX is pushed through
.412
.410
.408
.407, smallest CH4D I have so far.

.411/300gr TSX is pushed through
.410
.408
.407

The Barnes momometal copper bullets seem to grow back to 0.002" bigger than the smallest die they passed through last.

Both of the above processes produced final results of these .409-caliber bullets, 350-grainer and 300-grainer:



The minor diameter inside the cannelures of the bullets ended up roughly .393" to .397" for the two, no change from where they started,
these cannelures being "rough-cut" at the factory after the hammer/extrusion forming of the rest of the bullet, I do believe.



Press used was this little one-ton arbor press from Harbor Freight tool store.
No cheater bar required. STP oil treatment used as lube.
I barely found room for it on the last unoccupied corner of my little garage workbench:





A Dillon cast-aluminum die-holder block worked fine as a make-do for holding the CH4D die upside down as compared to how it fits in a regular reloading press.

Based on the above results, bullets measured one and two days after resize:

I need a .406" CH4D final die to get spring-back to .408-caliber.
I need a .409" CH4D final die to get spring-back to .411-caliber.

Does this agree with other experience of members here?
Anybody else tried resizing Barnes TSX to smaller diameter?

.510 to .505 should be do-able too?
Does one need a .503" CH4D sizer to end up with .505-caliber bullets? I guess so.

From past experience with cup & core bullet resizing, I thought the spring-back would only be 0.001".
These copper chunks seem to spring back twice that much ...

I would watch out for pressure excursion due to minor diameter vs. the bore dia

quote:

Originally posted by jeffeosso:
I would watch out for pressure excursion due to minor diameter vs. the bore dia

.408 caliber barrel has .400" bore diameter.

The .393"-.397" minor diameter is now a less sloppy fit to bore diameter than it was for the .416 and .411 barrels.

As long as the minor diameter of bullet is equal to or smaller than bore diameter of barrel ... how does that cause "pressure excursion?"

So is jeffeosso just making a statement of general principle?
Thus it is up to me to go figure it out myself?
He is highlighting a potential concern?

OK, got it.
No problem in this situation.
DOES NOT APPLY.

Hey doc... Don't play English prof.... I didn't put anything there than requested data.. In resizing banded bullets.. Or turning them... Watch out for minor diameter issues...

QTIP

Yes, jeffeosso, that is why I included the minor diameters in the original post, to show there were no problems, in this particular case.
Resizing the .416 TSX to .408 just makes it a little better.
The minor diameters on all the TSX bullets are way sub-bore size.
Thanks for emphasizing this point.

I am just wondering if anybody else besides me has ever re-sized TSX bullets to smaller diameter,
and did they note a spring-back of about .002" for bullets that were around 40-cal to start with?

I am planning on getting a .406" diameter CH4D sizer to end up with .408-caliber from a .416 start.
That will expand the bullet selection for .408 Chey-Tac and "400 Bald Eagle."

Likewise a .409" is needed to end up at .411-caliber from a .416 start.
That expands the 400 Whelen bullet selection.

Minor diameters in the cannelures: No problems for the above,
and no problem for this one either:
.416/350gr TTSX becomes .411 or .408 caliber

Ron,

I don't recollect any monometal bullet resizing discussions over the past few years (doesn't mean there weren't any though). I do recollect a number of discussions on the DR and wildcat forums and all experienced a similar spring back when resizing C&C construction bullets.

I do recollect Rusty going through a similar endeavor when resizing C&C bullets for the 0.408" slugged bores of his vintage NE DR; I believe it was a .400 Jeffery but May be mistaken.

I'd say that you're far ahead accuracy wise and for hunting purposes by using resized monometals as there'll be zero concern with separation of the lead core from the cup during the resizing process. I don't recollect the 'correct word' for the upsizing, but it was mentioned to take a C&C bullet 0.004-0.006" under final size and then squish the sucker in a properly sized bullet forming die to eliminate any voids between the copper cup and lead core.

Oh well, have to finish my cup so I can continue 'slupping' boxes for the other half...

Ron,

You need to see if Jamison or someone will make you a couple of headstamp dies. That 1 ton arbor press should work nicely.

Perhaps a fixed Bateleur across the top or bottom with the opposite side slotted to except numerical print shop numbers.

Just a thought...

Jim,
Dave Estergaard got a bunter for his 470 Mbogo headstamp, used a hydraulic automotive jack as his press IIRC.
I am not that ambitious.
Recovering from the Dallas Influenza right now.
I will be needing a cheater pipe on the handle for a few days yet ...
Hope you and yours stay well if you are moving into Texas right now.

I think I have a new source for bullets to supplement existing purpose-made .408 and .411 bullets.
The process won't hurt the Barnes bullets, might improve accuracy. TTSX is next.

Good point about eliminating the "discontinuity" problems of cup & core bullet resizing. Thanks for reminding me. Glad I tried this.

quote:

Originally posted by RIP:
Recovering from the Dallas Influenza right now.
I will be needing a cheater pipe on the handle for a few days yet ...
Hope you and yours stay well if you are moving into Texas right now. :tu2

Ron,

Bummer about the influenza, that's definitely bad stuff. Take care that it doesn't get worse.

Some things came up in Kali so we moved inland into a small house in Menifee, Riverside County, last week and are still unpacking. Texas is not forgotten, it's just on the back burner for a couple of years.