Is there a point where with a small increase in velocity, the felt recoil increases substantially but the velocity only increased a relatively small amount?

In the 404 Jeffery in particular.

Just as an example say a 400 gn 404 J load at 2250 fps the recoil is relatively moderate, but at 2300 it goes up what might seem disproportional for a 50 fps increase.

Or any other amounts say from 2300 fps to 2350 fps or 2350 fps to 2400fps ect.

In other words a relatively small increase in MV of 50 to 100 fps or even 150 fps the recoil changes noticeably.

Or is the recoil increase fairly lineal with the MV increase?

I not referring to a MV outside the "normal" 2400 fps for a 400 gn bullet load and not necessarily the calculated recoil be rather the felt recoil, in the same gun of course.

If I remember correctly someone commented about a 50 fps increase MV in a Lott and the recoil it went from acceptable to uncomfortable.
Or that 2200 fps in the Lott is one thing but 2300 fps is a whole new ball game.

I didn't know if the recoil went disproportionally at some point or if the level of recoil just beyond their tolerance or comfort level.

Allen

so, i am a recoil junky...

400gr at 2250 is marginally differnt than 2300 .. only a LITTLE bit...

Now, at 2400, it "sits back quick" but not bad...

see if you can find someone to let you shoot a 416 rem and a 375HH... you'll find the difference, while present, aint much
jeffe

I noticed the same thing in my 375 H&H although recoil was mild with all loads. Shooting a 350g Woodleigh at 2360 fps was mild, 1 grain more powder produced 2410 fps and recoil was noticeably more and pressure was a little high, 1 grain more produced 2510 fps and significantly more recoil. I'm shooting 3 grains less than that now for 2310 fps which is a nice low pressure load that duplicates the Norma PH ammo for the 375 H&H. It seems like when you hit a bit past max pressure for some reason recoil seems to increase beyond what our recoil calculators tend to predict. I have no mathematical explanation for it though, but it is a good warning sign along with cratered primers ... I noticed the same phenomenon in my 270 which feels like a 22 these days lol


Chuck

I notice this w/ any of the caliber 375 & up. One you are into 300gr+ bullet wt. even 50fps increases start pushing recoil up. I find 400gr @ 2200fps reasonable, got to 2250fps & I can feel the diff. At 2300fps, it starts to get uncomfortable. Then again, there is little to no advanatge in that extra 50-100fps in a big bore, once you are over 2200fps.

I don't have enough experience with a 404 Jeffery to comment directly about that round, however it's probably going to be close to what I've experienced with a 416 Rigby. When shooting a 400 grain bullet, the 100 fps difference in velocity between 2250 and 2350 fps has about the same effect on recoil as the 50 fps between 2350 and 2400 fps. Once I push velocities over 2400, every 25 fps is noticeable.

Increases by the square of V delta...

I think the Rifle plays a big part in how recoil is felt. I can comfortably shoot my 404 Jeff CZ, using 450 gr Loads but shooting my 375 Ruger using 300 gr loads and the recoil is very painful, like a sharp stab, as opposed to the Cz's gentle push. Although I can shoot both very well, I don't find the Ruger very enjoyable. A well-made rifle makes all the difference.

This is what I had gathered in reading about the big bores and recoil. And was wondering if I was understanding these relationship correctly.

I am not necessarily concerned about a certain level of recoil but I am learning about how the velocity/recoil relationship goes.

One of the things that had me wondering was reading older articles about the 404 Jeffery and it being a moderately recoiling cartridge, then reading of the recoil currently being a bit more robust.

This makes sense now, as some of the older loads were just a bit lower, but that can change the recoil characteristics quite a bit, even though the velocity isn't that much higher.

Allen

My Heym bolt 404 at 2300 is EXTREMELY easy to shoot. Recoil is on par with my Ruger 375 with 300 gr factory loads. My Heym weighs in at 11# and my Ruger at 10.5#. Even from the bench, no worries.

Gary
DRSS NRA Lifer
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