What exactly do you guys mean by slip fit on the White rifle. Is the bore over sized? Or is the bullet undersized? It sounds to me like it has something to do with ease of loading a conical. It sounds interesting to me. Why couldn't you under size a regular poured bullet? Tom.

Well in my case the rifle is a .504 White Ultra Mag. I get best results shooting a .504 diameter conical. They are easy to load, and when you fire the charge, the conical spreads out into the rifling on the way out. The conical is just large enough not to fall out of the bore, but still easy to load. For instance, I can load the conical with simple pressure on the ramrod.

There are some shooters that do use smaller bullets. I use a .452 hornady xtp in my optima. A buddy of mine likes the .44 which is .430 hornady in the exact same rifle. He uses a thicker sabot.

Do you size the .504 conical? Or is the bore slightly larger? Thanks, Tom.

The bore on my White is made to .504 specifications. I then have the conicals custom made by BullShop Conicals.

Thanks. I believe a standard 50 caliber is .501. I am not sure about that. But it would explain why a 50 caliber bullet(.501) would slip fit in the White. Tom.

A .503 will fall right down the barrel of my White and I can shake it back out any time I want.

Tom,

I really don't think bore oversized, bullet undersized is the way to look at it. The barrel is what it is. I think what makes the White rifles great conical shooters is that each barrel is so consistent from muzzle to breach. A properly sized conical slips down the barrel and you feel no difference on the way down. I think it also has something to do with the type of rifling used.

The Whites are great sabot shooters as well. Several here can confirm that.

Quality/consistent bullets are also a must when using slip fit.

Hopefully Underclocked can share some info. I think he has been dealing with slip fit for a lot longer than the rest of us put together.

In my Knights I shoot Bullshop .504 400gn bullets, In my Whites (U-Mag & Whitetail) I use Bullshop .5045 460gn and 400gn. The difference if I remember corectly is the .5045 are only ran thru the sizer once , where the .504 have been an thru the sizer twice. Powder loads very from 70 to 110 gns of t-7ff and no wad to using a fiber wad on top of the powder.
Patience and practice equals a proven load.

You guys have it all wrong. The White rifles work the way they do because Doc White is up there in Utah over a pot of boiling bat wings and stuff waving a magic wand over all the rifles before they get shipped. That is the only explanation that makes any sense when you see how the White rifles shoot. I am just glad I finally got my hands on one, I sure wish someone with money would bail out the company so that they could continue making the great rifles. By the way there is no "standard" bore size. My Omega measures .500 exactly with some variation down the bore. My NEF measures .503 with a pretty smooth bore with no noticable variations, My 91 White measures .504 with no variation for the full length of the barrel. White does make a bullet for the .500 diameter barrels as well as for the standard .504 White rifles. I have some to try in my Omega when I get the time.