Cliff R wrote:"Cliff...wildcatter's been there, done that with the load you're talking about. I'm fiddling around with the same idea, using 325gr Barnes Busters. Use Remmy 7 1/2 primers and A1680 powder. There is a post about this very thing in the forums here...use search function and you should be able to find a lot of discussion about the heavier loadings. 1800fps is eminently do-able; 2000fps and above involves messing with the upper's hardware a bit, but can be done. Again, see wildcatter."
Many thanks, I'll take a look.
As for this particular topic, loading heavier bullets will increase pressure, all else being equal. They are harder to get moving, more sectional density, and more of the bullet engaged in the rifling (not always true with boatail designs). This can cause pressure "spikes" as we are working up a maximum safe working load. I've ran into this with smaller high velocity calibers, but not so much with the 45/70, which I have a lot of experience with.
I'm hoping that the 450 mimics the 45/70 as far as being able to duplicate or exceed the factory loadings while keeping things well within the safe zone.....Cliff
45-70 shooter wrote:Dare I mention that while there is a paucity of loading data for the 450 BM, there is TONS of it out there for the
460 S&W Magnum.
The 460 is a slightly longer case BUT when you consider the deep seating and hard crimp needed to fit in an X frame S&W, the powder capacity (primer to base of bullet is very close. Generally the S&# loads use more powder because Hodgen tested in a 10.743" pressure barrel...... 9.3" of barrel on the 450 will burn more powder rather than light up the night sky (ask me how I know).
So dig out your 460 data,consider the pressure limits of both cartridges and load em' up.
There is nothing especially dangerous about hand loading any smokeless cartridge if you can RTFI and follow them.
Shooting a large bore flinter with real black powder is far more dangerous. Ever seen a guy with a hole in his palm from a ramrod ? OUCH !
Classic failure of not RTFI !
Yes Sir, ..."Hope in one hand"... Well, you know the rest of it.. The concern here with many, is that we can duplicate the 460S&W. I Hope that is not true! The 460SW has in it's quiver many 70,000 psi loads which WILL blow up our 450b. It's instructive to look at such data but, with a capitol "B"..But, only instructive and may not actually translate into our system, at all.
My Fear is that somebody is going to blow themselves up! If they do, make sure your "Will" is up to date and that it includes the words that the accident wasn't really an Accident, but are the results of your experimenting, and outside of all excepted practices, and that this Board or any of it's members are not "Responsible" in any way!
I have shown you guys some pretty incredible practices, but the truth is, I have a lab and do this stuff under highly controlled conditions. As such, these claims should be taken with a grain of salt. You should only use my data as an instructive learning session and not something you can do in the field. In fact anything you read on the Net, whether here or any other site should "ONLY" be taken as examples and the phrase to .."Start low and work up" should have real meaning to you, but, only if you can read the pressure signs.
As for 45-70 Shooter, to use as an example, and let me apologize, right now, for doing so. If memory serves, you have stated you have 50++ years of loading experience, well, me too, and I am continually impressed in how much I don't now, and I am a Ballistics Engineer! I have had many Guns blow up on me and by pure grace I haven't been Hurt too offal bad.
This is a simple Fact.. "We don't know what we don't know".. Please use this Moniker when loading and if you do blow yourself up, remember not to send a lawyer, because you've been continually Warned!!
Again, My extreme Apologizes to 45-70 Shooter and to any others who may feel offended, by my Non-Intellectual Prose (When I grow up I wanna bees a Word Smith, right now I ain'ts (( as if any of us are, right??)) )..
..t