Has anyone chronographed the 450/400 reduced load with the 5744 powder and 400 gr bullet, or otherwise know the fps? If I knew the fps I could figure the ft lbs and have a rough idea of its equivalent in other guns. Maybe 45-70 type energy? Same info as to the 450 NE would be helpful too.

Also, does anyone know a reduced load along with velocity for the .416 Rem Mag? Would it use 5744? (I know that's neither DR nor Searcy).

Shack,

Can't help you with the 400 grainer. But, I shoot a hard cast 340 FPGC at 2151 f/s which gives 3493 footpounds at the muzzel in my Krieghoff 450/400X3.

This is an old thread and I want to bring it up again as I'm still looking for the answers and thought maybe there'd be a few new folks by now here who have some opinions.

The exact 450/400 reduced load is 35 grains of 5744 powder with the 400 gr bullet. I would just love to know what the fps of that is out of a 26" barrel. But, I don't have a chrony. I'll calculate the energy if someone has used this and has clocked it. Or, I'll even settle for a well educated guess.

Same deal on the .416 Rem Mag.

Shack,

The following is from Accurate Powder using 5744:

Bullet weight: 400 grains.

Low load: 30.0 grains (1400 – 1500 ft/p/sec)

Midrange load: 40.0 grains (1700 – 1800 ft/p/sec)

Maximum load: 49.0 grains (1900 – 2000 Ft/p/sec).

You can extrapolate for 35 grains.

Hope this helps

I really appreciate that, thanks.

At 30 grains the energy seems to be 1867, and at 40, it seems to be 2719. That should put the figure for 35 grains of powder at, give or take, 2293 foot pounds..provided, that a math model like that doesn't have some catch to it I'm not aware of.

The velocity of the full load is (I think) supposed to be 2150 which apparently is about 4104 ft lbs.

For comparison, the light load as far as I can tell, comes in under the .405 Winchester (300 gr bullet @ 2204 fps) at 3236 ft lbs.

But it comes in above the .45-70 (400 gr bullet @ 1394 fps) or 1748 ft lbs.

That appears to make the 450/.400 light load a very hot .45-70 or a real mild .405.

If anyone thinks that is incorrect, of course feel free to say so.

Anyway, I think it's good to know exactly what one is firing beforehand.

I am guessing that the lack of responses here is due to very few shooting this cartridge with less than the full loads, which I can understand.

I shoot 210 and 300 gr bullets using 5744 but havent tried any reduced 400 gr loads. The 210 and 300 loads i use regulate in my double and they work real well on hogs and deer.

bigfats, do you have a link to those 5744 figures? I looked in Accurate Powder's load data section and on their page about the 5744 without finding anything for the 450/.400. I'm sure it's there somewhere.

degoins, what kind of bullets are the 210 and 300? Handgun bullets by any chance? The 300 sounds like the "75% Rule" at work.

The 400 grain lite loads came with the gun, and I kinda like being able to use just one bullet for all, including full loads. One stop shopping you might say. I also like that the 5744 doesn't need fillers. I've read what I could find here about fillers, and it seems there are mixed opinions on the subject.

Shack, the 210 gr bullet is Hornandy's 41 mag pistol bullet and the 300 gr one is thier .405 Win bullet. I've used 5744 for both and also used the 75% rule with the 300 gr bullet using IMR4831.

You can email Accurate with your questions and thier load tech will send you data pretty quickly. in fact you can do a search on this site and i have 450/400 date that i got from them poted somewhere.