BFR 45-70 or .450 Marlin

[Beyond_Perfection]

I am having some trouble finding real world ballistics for these rounds in these revolvers. :banghead:
Most of what I find is from a friend of a friend or "Recoil tears your arms off" I know it will not recoil bad at all as my .500 and .460 are very manageable.

I know they are not going to touch my .460 S&W for speed but what can I expect?

I may order it with both cylinders as it is very reasonable to add that option at time of order.

 

[ArchAngelCD]

The 450 Marlin round will be much more stout than the 45-70 in a handgun, even a very heavy handgun like the BFR. If you reload you can make the ammo to suit your needs so either would be fine. If you are buying ammo I would probably go with the 45-70 because it's more available and the price is somewhat less.

 

[Harley Quinn]

BFR is the only one in 450...

http://www.magnumresearch.com/bfr_fact.asp

According to makers of BFR

THE ONLY'S
Only .450 Marlin revolver.
Only .45/70 revolver that is not a joke. This gun really works and shoots like a laser.
Only .45 Long Colt/. 410 revolver
The one .480 Ruger/.475 Linebaugh under $900 retail.
Only serious heavy caliber handgun that is designed from the floor up to eat up the powerful cartridges that it is chambered for. The BFR is NOT a standard revolver "converted" to a heavy caliber. It is designed and built as a heavy caliber handgun and will hold up to the test of repeated and sustained firing.
RECOIL
The BFR in 45/70 recoils less than any .44 Magnum that weighs under 3-pounds.

More on it...

http://www.sksboards.com/smf/index.php?topic=12984.0;wap2
Ballistics about all I can do is show stats, never fired it only read about it
http://www.cpcartridge.com/450marlin-B.htm

 

[BrocLuno]

I like it, but I'd vote for the 45-70 too

 

[Cosmoline]

I've shot both these rounds a lot out of leverguns, and the .45-70 out of a BFR. I'd also say go with the .45-70. The .45-70 is really three different cartridges in one. You have cowboy loads which are cast bullets and BP or smokeless at very low pressure. These are the ones certified OK for trapdoor Springfields in the load manuals. Then you have your SAAMI spec hunting rounds which are standard factory production. Then beyond that you have what are really .45-70 +P or .45-70 magnums put out by Garrett, B-Bore and as handloads. Each category is really a different cartridge, esp. on the recoil end. With the BFR you can should be able to comfortably shoot both cowboy loads and the standard factory loads. I think you'll be surprised how nicely the big revolver rolls.

The .450 Marlin, OTOH, has standard loads in the range of the .45-70 +p. You can download it of course. But anything you buy over the counter is liable to want to take your wrist off out of a revolver. IMHO it would really shine in a compact bolt action brush gun, but nobody listens to me ;-)

 

[Beyond_Perfection]

What I am looking for is real world fps from 10 inch BFR

 

[Molasses]

10" .45-70 BFR. I ran factory ammo from "the big 3" ammo makers over a chrono a few years ago and was underwhelmed. IIRC, the 300gr JHPs ran in the neighborhood of 1,200-1,300FPS and the 405gr JSP was around (under?) 1,100FPS.

Magnum Research has their claimed velocity figures for the different BFR chamberings in their FAQ section, about 2/3 of the way down the page. http://www.magnumresearch.com/FAQ_BFRRevolver.asp

 

[Harley Quinn]

What I have found is...

Many Ammo makers put the velocity on the box of ammo, it is information based on their findings...

Then we have others that set up and shoot reloads and have their results...

Good place to start is with the Ammo manufactures imho

This is from the MRI page

BFR .450 Marlin, 10-Inch
4.5 lbs.
350-gr. Bullet
1814 FPS
109.04 Recoil Factor

BFR .45/70, 7.5-Inch
4.4 lbs.
300-gr. Bullet
1472 FPS
74.1 Recoil Factor

BFR .480, 7.5-Inch
3.75 lbs.
325-gr. Bullet
1409 FPS
81.44 Recoil Factor

Redhawk .480, 7.5-Inch
3.3 lbs.
325-gr. Bullet
1409 FPS
92.55 Recoil Factor

Redhawk .454, 7.5-Inch
3.3 lbs.
300-gr. Bullet
1600 FPS
115.15 Recoil Factor

Freedom Arms .454, 7.5-Inch
3.25 lbs.
300-gr. Bullet
1600 FPS
116.92 Recoil Factor

Super Blackhawk .44, 8-Inch
2.9 lbs.
240-gr. Bullet
1400 FPS
98.96 Recoil Factor

They have even gone and given you a "real" recoil factor In their opinion

What I am looking for is real world fps from 10 inch BFR

 

[Prosser]

You sure that recoil factor is right?

I just ran it for my Maximum: what am I doing wrong?
Bullet weight 525 velocity 1350 fps add together:=1875 times 1350=2531250
Gunweight 3.6 pounds, time 80= 288 divide into 2531250=87.8906 Recoil factor???

My point, perhaps, is that their recoil factor may NOT be a real good way
to figure this stuff.

On the otherhand, the above load does recoil harder then anything I've ever shot, and, makes heavy .475 Linebaugh stuff feel like 9MM.

I just decided to run my FA 83 with 420's at 1350 fps. It works out to 93.33

Somehow the decimal place is moved in their calculations. Got it.