" Like other 40 Sharps numbers, this one used a 0.403-inch-diameter bullet, weighing 330 or 370 grains. These chambers were cut to use bore-diameter bullets (often paper-patched). "

Ken, may I suggest you read the above again with this in mind. You said your .410 bullet wont slide in the fired case. That strongly suggests THE CHAMBER is cut for a bullet less than .410" in diameter.

Your original post did not ask about paper patched bullets. It inquired about grease groove bullets.

What matters is not what cartridge of the world summarizes, what matters is what the actual dimensions of the chamber in your rifle are.

Even though cartridges of the world clearly states bullets .403" in diameter you read right past that to .408 to .411 bore.

The answer to your question then is a conundrum that cannot be solved until you determine what diameter grease grooved bullet the chamber in your rifle requires using the brass cases that you have.

The original IDEAL, (pre lyman) bullet mould that I have in my hand that is recommended for that cartridge is listed at 330 grains and is inscribed 403150 which means a .403" diameter bullet.

The 370 grain bullet listed by IDEAL for this cartridge is 403171 which also indicates a .403" diameter bullet.

Both the 403150 and the 403171 are grease groove bullets.

Moreover, what Bruce Molds is implying and I am saying is that the groove diameter of the barrel is always a larger number than the bore diameter.

A .410 Bore would have something like a .414-416" groove, more or less.

If, as cartridges of the world states, the rifle was originally rifled to take a .403" bullet the bore diameter was probably less than .400" when the rifle left the factory and the fact that you are able to chamber a cartridge with a .410" bullet implies the rifle has been altered as Bruce surmises.

Again, for your safety and the longevity of the rifle it is wise to determine the actual dimensions of your rifle before further loading for it, especially if you plan on shooting it very much.

Thanks DD. While it is interesting for me to find and use a grooved 330 , I use a Paper Patched bullet, 330, with a TOTAL width of .403 after patching with 55W. . It fits in the bore by hand and can be pushed down from the muzzle slightly. So, That is my choice of load over the 64 , 2F.
no problem there.
While the .410 groove bullet fits the case, it's ONLY after opening it up with a .410 expander, then using the crimp die to slightly tighten.
I MAY, not sure yet. get a .406 sizer and size it down slightly...
But that is in the future....

Thanks...Ken

So please help me out here with what I think I hear - if the grease groove bullet does not fit into a case that has been fired from the chamber of my rifle then the bullet is too big for the rifle? And I should be able to seat my grease groove bullets without neck expanding?

fogman,
you need to think in terms of bore diameter or groove diameter, rather than greaser or pp.
and then what is the chamber for, bore dia or groove dia bullets?
if your chamber is for groove diameter bullets, you should be able to slip fit a groove diameter bullet in fired cases.
in actual fact most chambers are a little oversize, so the bullet needs to be a little oversize to fill the fired case.
a match bore diameter chamber should slip fit a bore diameter bullet.
keep safe,
bruce.

(12-19-2017, 05:31 AM)bruce moulds Wrote: fogman,
you need to think in terms of bore diameter or groove diameter, rather than greaser or pp.
and then what is the chamber for, bore dia or groove dia bullets?
if your chamber is for groove diameter bullets, you should be able to slip fit a groove diameter bullet in fired cases.
in actual fact most chambers are a little oversize, so the bullet needs to be a little oversize to fill the fired case.
a match bore diameter chamber should slip fit a bore diameter bullet.
keep safe,
bruce.

The rim at the mouth of the case frequently is rolled and requires deburring for a slip fit of any bullet, gg or pp, groove or bore diameter.

groove diameter gg bullets "should" slip into the mouth of a case whose mouth has been deburred if that case was fire formed in the chamber of that particular rifle.

Stick to the issue in the original post!

The issue here is a chamber cut for a .403" diameter bullet to fit a .403" groove diameter bullet barrel that has a .410" diameter bullet seated in a case fireformed in a particular .403" designed rifle chamber should not and probably will not slip fit a .410" bullet seated in that case fired in a .403" chamber. The cartridge will not chamber.

opening the chamber to slip fit a .410" bullet makes the bullet signicantly over groove diameter and greatly alters an otherwise original and valuable rifle.

Each rifle is sort of a law unto itself and before loading for it the bore and chamber dimensions must be determined and the bullet altered to fit the rifle, not the rifle altered to fit the bullet.

OK got it. This is now clear. Thank you all.