7mm-08

[Head416]

That would assume 1) linear acceleration and 2) that velocity peaks at the muzzle and not before.

And more importantly 3) makes the table I posted above improbable.

[MotoSook]

Unless you put pressure ports along the barrel of the riffle and log the pressure along the length you'll have to make some assumptions, yes?

[Head416]

Yes. But my assumptions result only in "that's not possible". Yet we have claims that it is indeed possible.

I have no idea why or how. Whatever it is, it's more complex than just looking at the bullet weight and muzzle velocity. Or it's make believe.

[emcon5]

If the only concern is for your wife, at the range, buy the rifle you want, and get her a recoil pad or 3.

Start with this:
PAST Hidden Comfort for Women Recoil Pad Shield Ambidextrous - MidwayUSA

If that isn't enough, you can put a good pad on the rifle, or add something like this:

http://www.midwayusa.com/viewProduct/default.aspx?productNumber=699899

[Jeff Higgins]

Originally Posted by Head416

I started college as an engineering major, and I did that long enough to know there is no free lunch, no perpetual motion, no free energy, etc. That's why I didn't understand how a 7mm-08 could perform similar to a .270 with less recoil. I understand the difference between actual recoil and felt recoil. But there seems to be more going on that just perception.

Here is an excerpt from a Recoil Table seen here:


(weight in pounds, recoil energy in foot-punds)

The above table does not take felt recoil into account. Yet it claims less recoil for the 7mm-08. Maybe it has to do with the pressure of the cartridge, burn rate of the powder, or something completely different. It seems impossible, which is why I started this thread.

The only thing I can think of is that the 7mm-08 accelerates more slowly than the .270.

Engineers on this board may be able to educate us re: impulse-momentum. I changed my major from ME to CIS, so this gets beyond me!

The .270 loads shown in that table are a good deal more powerful than the 7mm-08 load shown. The easiest ones to compare are the respective 140 grain loads - add 140 fps to that 7mm-08 load, and recoil will will be identical (for all practical purposes) to the .270 load.