I was just wondering what ever happened to this project? I'm more into shorter rounds since they seem to be less expensive to load plus a fellow at the range let me try his Marlin in 256 although it was the rimmed version. I believe the brass can be made from any of the .222/.223 brass -- is this correct? I have some 9mm magnum brass but I believe it's a hair short for making a 256 Winchester Magnum rimless. Anybody have any updates on this project?
yup I was pretty excited to see this project as well, I have dies and some bullet making equipment for the 256 and have made a lot of rimmed brass from .357. I don't have any quarterbore barrel blanks though and am busy driving myself crazy with the 9mm/.357 rimmless version of the .223 brass thing right now.
Ok, I'm puzzled. I looked up a neck reamer for the 256 Winchester Magnum (.257" dia.) and this is what they have as an explanation; "Neck Reamer #257, for Original, Classic and Power Case Trimmers. Use with .257" diameter bullets. Thick case necks can cause high chamber pressures and flyers. The Forster Neck Reamer mounts in the cutter of a Forster Case Trimmer in place of the pilot and removes the excess brass from the neck walls. The Forster Neck Reamer is manufactured from high grade, wear-resistant tool steel and ground .0025" to .003" over the maximum bullet diameter[/b]. The staggered tooth design cuts the brass smoothly without chattering.
Does this mean that they expect the brass to expand a hair while it's being reamed and will spring back to a smaller diameter? I am a mechanical moron so I would have expected the reamer to be slightly undersized -- but then I am a moron. You guys have any input on this?
Talked to some fellows on another site and they believe the reamer is to be used on fired brass. It's to clean out any lumps or bumps. I guess the next thing is to see about a custom reamer -- say something like .255" or 256" in diameter. Either that or an FL die that takes neck sizing dies. Neck size to .002" oversized like fired brass and ream -- then resize to the correct neck size. Darn -- having the right reamer sure would make things easier.
Last Edit: Apr 20, 2011 20:22:50 GMT -5 by 22boomer
No, i do not think they intend the brass to expand during reaming ( and in my experience it does not) I think they intend you to use it on fired brass that has flowed a bit and is getting thick in the neck (not something I have ever had trouble with) And yes That is what I was trying to get across in my E-mails, using a neck bushing that is over size enough to make the reamer work right on Sized brass. Kind why I have gone to outside turning, make a mandrel(pilot) that is undersize and then adjust the cutter to leave you with about .010-.012 neck thickness. sad thing is each lot of brass will likely require its own pilot and adjustment on the cutter. it really IS a PITA. Good Luck
This is equally a PITA making high pressure .45ACP brass from lace City surplus .308, i finally just had to load it all up and fire it in a loose Chambered FN/FAL to get it big enoug that the Forester inside reamer did not make the brass unusable.
Well I got the same info from the other site. I guess the problem I have is I want it quick and easy -- just a few steps. It would seem the easy way would be to FL size the brass so the outside of the neck is correct and then use a custom made reamer to open the inside diameter to the correctsize for a tight fit on the bullet.
I think HMC710 had talked at one time about making such a reamer but that went on the roadside along with the 256 WM project.
I've been too busy shopping for some Quick N Easy GW has the short answer, exp to stock (.255 - .257) then outside neck turn if needed. Redding makes bushing dies with od bushings. Its going to come down to what the chamber is cut to in order to calc what proper neck tension / brass thickness is going to be. Anyone got a reamer?
I got lots of reamers, just that none of them are the right size for what i am trying to do.
It seems like if you have a neck bushing about 10-12 thou larger than you inside reamer and another about 5-6 thou smaller( than the first) you would be good to go. use the first one inside ream to get your neck thickness then use the second to get your neck tension. if you were realy sneaky you can get the neck just a couple thou smaller than the chamber, so that you never hit the plastic deformation point of the brass and it will spring back to unfired dimension after firing, and then you can reload with out further neck sizing. Seen it done that way in benchrest circles a few times, and tried it with my .22 cal version of the 256 and it works... kinda.
OK, just went to the Forster Reloading web site and found this;
Custom Neck Reamer for Original, Classic and Power Case Trimmers. Thick case necks can cause high chamber pressures and flyers. The Forster Neck Reamer mounts in the cutter of a Forster Case Trimmer in place of the pilot and removes the excess brass from the neck walls. The staggered tooth design cuts the brass smoothly without chattering. Photo illustrates three different sizes.
Please provide desired outside reamer diameter. Tolerance of your completed reamer will be plus or minus 2 1/2 ten thousandths of an inch. (.00025") Available Diameter Range: .176" - .460"
Allow 3 weeks for manufacturing and delivery
I have the Forster Original trimmer so I can get a custom neck reamer for $37! The question now is the size of the reamer. The bullet is .257" diameter -- should I get a .256" diameter reamer or go really tight and do a .255"? My original choice is .256". What say you?
kinda depends, whats the outside Diameter of your Sized necks ? i like to shoot for a neck brass thickness of about .012 ( seems to be what most factory brass runs) just depends on what you need to do to get there .