what's the law of diminsihin' returns on them bigger bullets?
i know ya half to keep an eye on overal cartridge length with the levers for function.....
i know the heaverier bulllet is giving up velocity due to it havin' to take up so much powder space. What is about the heaviest bullet you use in that lever that is the best compromise as far as velocity vs mass?
The trade off is this, your shooting a very hard cast bullet which does not take alot of FPS to push it thru anything that walks. The 45-70 was never intended to be a flat shooter... NEVER. But those with magnum idus I call it, want to take it up to Mach 3 sonic boom speeds. The trade off is this, the faster you go the more mass distruction you have, like those that are using 300-gr JHP bullets at 1950 plus FPS. The hit a deer at this speed will have massive distruction of meat, and wonder why because of explosive bullet performance. A 2000 pound bison hit with a 405-gr JSP at 1250 fps, mushrooms and causes little if any meat damage at all, being recovered on the off side just under the hide planting that bison down, as he just hit with connectic energy because of the slow FPS.
The reason solids such as Super Hard Cast bullets are used is for the bone braking ability such as the Coastal Brown that the pelvis was broke at 125 yards. Some trade off there in either wanting a bullet such as the 405-gr JSP or a super hard cast that includes a 540-gr or even 560-gr depending on how deep you can seat the bullet for the total OAL for cycling thru a levergun. With a single shot rifle such as a Sharps, Rolling Block or Rugar #1 or total OAL will determine by where your chamber throat is reamed out to, hence allowing longer bullet outset.
Even though I have shown my 500-gr Bison Buster, I have to seat that bullet well above the driving bands out on the nose to get the proper OAL for cycling. This is not a good way to use this bullet but it is hard enough so not to distroy the driving bands for accuracy purposes.
In reality Tim Sundle, who loads and sells Buffalo Bore Ammunition uses a great bullet knows that his bullet has plenty of penetration and advertises it as 430 gr. L.B.T.- L.F.N. - G.C. (1925 fps / M.E. 3537 ft. lbs.) (Big game up to 2500 lbs. - Penetrator Load)
and it does what he says it will do and is only $48.50 a box of 20.
I for one don't need to be shooting a 430-gr @ 1925 fps, as the butt end will become brutal with felt recoil. But I can load this same bullet to be 1500 fps and aquire the same results without ill effects on my shoulder. I have contacted a bullet maker that makes a very good .458 dia 430-gr WFN GC , and have expressed my desire for a bit larger dia bullet, as Marshal Stanton of Beartooth Bullets has already done the homework on this for the Marlin Guide Guns and the longer 1895 model testing for accuracy. This is why BTB makes not only the 425-gr Pile Driver Jr and 525-gr Pile Drive in .458 dia, but also .459 and .460 dia as he highly recomends the .460 dia
for best accuracy in our Guide Guns. Some may ask, why I don't just purchase my cast bullets from Beartooth Bullets or Laser-Cast etc. It is because I want to support a cast bullet maker that is located here in western Montana, who already cast bullets for a cartidge company that has an excellent track record.
A Word About Meplats
You will notice when looking at Buffalo Bore Ammunition
that the Meplats
of what he use for the 45-70, 430-gr WFN bullet are not as wide as Beartooth Bullets or even Garrett Hammerheads. Again Tim has tested and done the homework already, and is very sucessfull with his product.
I could go on and on.
Now having said that I would purchase Garretts for those expensive hunts, if I were hunting BIG coastal brown bears, or going over to Africa, then yes I would @ $70.00 a 20 round box. But, I'm not hunting coastal brown bears here in Montana, and even our bears, black or grizz don't require a 540-gr Hammerhead bullet. I would trust my reloads to anything that we have here.
When I get my new bullets, I will post them up, as well as show my shooting results.