Hello, I just bought a rifle chambered in .375 HH and have this question regarding recoil.

Would there be a decided difference in recoil in 300 grain bullets clocking roughly 2500 fps vs 270 grainers clocking roughly 2700 fps?

I am assuming the 300 grainers at 2500 fps should be a stouter recoil. Correct?

Sorry if this is a dumb question, just trying to learn.

I think there might be on paper but depends on what you percieve - I've used from 220gn to 350gn in that cartridge and don't really notice a difference but the rifle is heavy.

The heavier bullets in many cartridges are supposed to generate more recoil. I can notice it in my 458WM between the 400gn and 500gn.

Here's a calculator you can use to see for yourself:

http://www.shooterscalculator.com/recoil-calculator.php

JBM, online, has a recoil calculator. Simply enter the rifle weight, powder charge weight, bullet weight, and muzzle velocity.

If using the same type of powder then zero difference. Some times different powders will increase recoil, especially if combustion is not right.

Energy is energy, if a load provides more energy at the muzzle it is also going to provide more at the other end

Now perceived recoil has some more variables. Stock design, velocity, etc. I can tell the difference between 150 and 165 and 180 in a 300WSM. the heavier bullets feeling like they kick more.

I would guess the OPS original assumption is correct.

Shooting 5 different 375 H&H's with barrel lengths from 20" to 24" and rifle weights from 7 3/4# to 11# with both 270 and 300 grainers in each rifle I personally did not find much difference in recoil. But that is just me. Actually I decided to stick with the 300's in each rifle, although for North America a lighter bullet (235/250) would probably be adequate for pretty much anything. Terry

I wonder how to enter powder weight when it has a break?

Trying to factor in a brake would be tricky - the angle and speed of the gas (powder) would vary between makes and models.

I've run 270s @ 2550 and 300s @ 2200.
No difference from the shoulder.
A machine could probably tell you Kore.

Having loaded both 270gr & 300gr Woodleigh in my 375H&H with H4350 & Win760, I can tell you the recoil impulse with H4350 is sharper even though velocity was very similar.
After re-chambering this rifle to the Weatherby, this trend of the recoil impulse being sharper with H4350 has continued.
A regular dental appointment is needed if using H4350.

Cheers.

Strange, they are supposedly nearly the same burn rate, though the 760 is much more temperature sensitive.

I have not noticed a difference with H414 (WW760 clone) and 4350. (I'd only using the H414 for case forming.)

Out of my .375 Wby, I have shot 260gr ABs at 2,975 fps and 300gr NPs at 2,750 fps. The rifle is fairly hefty, so neither is very uncomfortable, but I "felt" a bit more impulse from the fast 260s.

Don't feel much difference in the two with a heavy Model 70. Dropping down to 250-260 grain bullets seems noticeably less but I am not pushing them that fast at 2,850 fps. The 235 better still. The 300s hit a recoil threshold for me and the 270s might be just a bit less at 2,700 fps, push them over 2,800 and then they may have more felt recoil than the 300s at +/-2,500 fps.

My pre-64 375AI (10 lb) is a mild kicker with all I've tried in it, but so far I have not shot 300 grain bullets in it - mostly 270 grain. I have not felt anything different with different powders when pushed to the same velocity.

I have a nine pound .375 H&H, find that recoil of the 250s is only a little less noticeable than the 270s and 300s. But the 350 Woodleigh was a different cat altogether - very noticeable increase.

I only use 300 gr Shock Hammer bullets in my 375 H&H @ 2670 fps. If I wanted to use 210-250 gr bullets I'd use my 340 Weatherby, 250 gr Nosler Partitions @ 3050 fps. JM

I have shot my 375 so much I shot it's throat out and had to re-barrel it. I went through many thousands of both 270 and 300 grain bullets. I actually can't tell the difference in recoil from one to the other.