410 Slug Question

[Matt3357]

Now before this gets moved, hear me out, it is rifle related.  Also I am not looking for insults, I am asking for information.  I have a plan to make a 410 slug gun from an H&R, not for deer, I live in Illinois where its illegal anyhow.  My question is on the difference between a slug in a shotgun shell and a bullet on the end of a casing.  For a 1/2 ounce slug in a 410, you are talking 16.7 gr of H110 at 1200 fps and 10400 CUP.  For a 44 mag out of a rifle with a 240 grain bullet you are talking 24 gr of H110 at 1800fps and 36200 CUP.  I realize that the 44 mag is going 600 fps faster and has 7 more grains of powder but what other factors could be increasing the pressure by that much?  Would it be that there isn't the empty space behind the wad in a slug shell?  What actually causes the pressure spike in a rifle case?  I just got to thinking about this when I decided to start loading for the 410. 

Thanks,
Matt

[jedman]

Check your loading data and or weigh your 410 slugs you plan to use.
Factory loaded 410 slugs are usually 1/5 and 1/4 OZ. in weight.
A 1/2 OZ slug would be in the 215 - 220 grains range.
with a load of 24 grs. of H 110 in a 44 mag,  there is still quite a bit of unused case capacity .
What are you using for a 410 slug ? Never seen any for sale before ?
      Jed

[Catfish]

I put a .411 barrel on a Moslen Nigant action and with 265 gr. bullets was able to get alittle over 1,700 fps. with slow burnning rifle powders before I started blowing out the rims on the cases. I wanted to use beass cases which would have made it equivelant to a .405 Win. But they won`t let me hunt deer with all brass cases in Oh. If I rember correctly the 3" Fed. loads get abt. 1,700 fps with a 1/5 oz. slug, that`s abt. 80 gr. If your interested in it I might try to work out a deal with you. You can use .405 Win. ammo as it is with no porblems.

[Matt3357]

Not really looking for a new gun.  Trying to use one I already have.  Just wondering if it would be possible to load a .41 mag pistol bullet in a 444 marlin brass case.  I would assume the plastic shell is thicker than the brass which causes the bullet to seat differently.  I guess no one is going to approach this part of the question so I will just have to wait and see.

Matt

[coyotejoe]

If you'll search in the "H&R/NEF" section you'll find there has been quite a bit of experimentation done with .444 brass in the NEF .45 Colt/410 rifled guns. That's a bit different since those guns do have .452" bores but you might pick up some ideas. Please do be very careful, you'll be tinkering in an area where no published guidelines exist. Smokeless powder does not always behave as expected and you simply cannot "extrapolate" loads from one cartridge, such as the .44 magnum, to predict how that powder charge will behave in your .410. If your .410 is a smoothbore there will not be much point in working with conical bullets since they will tumble wildly but a caseful of blackpowder and a .410" roundball might be interesting. I doubt you'll find anything better than commercial .410 slug loads, but have fun.

[Matt3357]

Coyotejoe,

Yeah I know about the 450mongo and after a bit of thinking, I do not believe 444 brass will work in my situation other than for a brass shot shell so I think I am going to stick with a 410 shell and a 41 mag cast bullet.  The reason I do not what to stick with factory is because they are so light, sized for a fixed choke, and too soft.  In my original post I was not insinuating that I was going to extrapolate data from the 44 mag, it was just an example.  I know the dangers of have a light load are just as bad as having a heavy load especially with H110.  This was basically a functionality question of the compressed load of a shotshell with a slug versus the open load of a bullet on the tip of brass.  I am getting an mec 410 600jr that I will just load up some slugs and some rounballs with published loads and see what happens.

Thanks,
Matt