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BK7saum
07-29-2013, 10:15 AM
I have a couple of heavyweight WFN molds in 4570. I loaded up some dummy cartridges and the rounds won't chamber without deep-seating the boolit.

Is this due to a short throat in the marlin? The boolit nose/ogive is wide and full diameter 0.457" for most of the nose. To chamber the boolit had to be seated an additional 1/8" or so past the crimp groove.

Can I size the nose in a 0.452" h&I die? I probably won't be shooting many 430 and 550 grain WFN boolits through a 7 lb rifle.

Thanks, Brad

RobS
07-29-2013, 10:19 AM
sizing a small part of the ogive down may work and worth a try (if you have a .454 die I would try that first) but I would only do enough to chamber that way the boolit still fills the throat.

BK7saum
07-29-2013, 10:27 AM
I don't have a 0.454 die. No long colt or other here, just a little ole ACP.

The opening into the Lyman dies are belled a little and I planned on sizing just enough so they chamber to the crimp groove.

frkelly74
07-29-2013, 11:44 AM
Here is a crazy idea. This is something I stumbled on to once when I was trying to do just what you are trying to do on the cheap. Use a 30-06 or 308 winchester full length die as a bump die to size the nose of your boolit. Lube, Take out the de-priming pin, push the boolit in from the bottom as far as you need to using your press and a ram from one of the lee sizing outfits, to get the right nose diameter, back it out with w pin from the top, Voila! The 06 die has more taper than the 308 and goes all the way to .441" from .473" at the base. The 308 tapers to .454" from the .473" base. These measurements are from my Lyman book. See if it works for you.



I am sizing 412-265 ranch dog boolits to fit my ruger cylinder using a 30 remington die just as described. I think 30-30 might work as well for 41 cal bullets.

BK7saum
07-29-2013, 11:49 AM
Thanks. I know that I now have another option if I need.

Brad

montana_charlie
07-29-2013, 11:53 AM
Make a chamber cast in that rifle. Then you will know what kind of 'hole' you are trying to create cartridges for.
CM

BK7saum
07-29-2013, 11:56 AM
Do you recommend an impact slug with pure lead? Is that an option with a marlin levergun?

45 2.1
07-29-2013, 02:14 PM
I have a couple of heavyweight WFN molds in 4570. I loaded up some dummy cartridges and the rounds won't chamber without deep-seating the boolit.

Is this due to a short throat in the marlin? The boolit nose/ogive is wide and full diameter 0.457" for most of the nose.

The throat isn't the problem. The problem is the person who designed the boolits nose. They didn't know how to fit it correctly. You can nose size for your rifle or use it in a 458 Mag...... either would work.

BK7saum
07-29-2013, 02:49 PM
These molds are designated as 45/70 WFN in the maker's catalog. You would think that they would chamber in a 45-70. They seem to have the location of the crimp groove correct based upon the length of the nose of the boolit.

At this time, I unfortunately do not have a 458 WM to shoot these out of.

Brad

rond
07-29-2013, 05:48 PM
Trim 1/8" from your cases for that rifle so you can crimp in the groove.

BK7saum
07-29-2013, 06:14 PM
I've considered that also. I have some Hornady cases that are already short anyway. I just can trim them shorter.

turmech
07-29-2013, 08:51 PM
I had very similar problem with a 444. What has been mentioned already are good ideas. I would guess the hornady brass if made in the era of their flex tip bullets would be short enough to work.

I elected to have accurate molds make me a mold with a undersized front band and it worked like a charm. I have no experience if that would apply to your situation with the 45/70.

W.R.Buchanan
07-30-2013, 12:43 PM
Who exactly, made the mould?

Randy

BK7saum
07-30-2013, 03:33 PM
Ballisti-cast. I got it used but it looks brand new. Not sure how old it is.

Mop
07-30-2013, 04:11 PM
Hey Cast Boolits, new from Mis'sippi. I encountered the same problem with a Lee .457-340. Even in Hornady brass it had to be sunk deep. Was told to sink just shy of rifling but I'm still leary about pressure. Should I be? Since there is precious little info on loading 340-350 cast bullets in 45-70(at least to this newbe) I can't decide weather it would be safe.

foxtrapper
07-30-2013, 05:07 PM
The Marlin 45/70 i owned had very short throats. Do yourself a favor have the throat lengthened by a smith. This way you can use the wfn's. Having that big bullet tight against the rifling shoots pressures up dangerously .