Can you point me to some research on these numbers? Seems like an area I'd like to research.
Those percentages were using light bullet for caliber loads for both. Trying to keep variables in check: 115gr vs 155gr. The differences can be narrower if you compare different bullets, say a heavy bullet in one caliber vs a light bullet in another caliber.
The recoil energy is kind of how much push you feel, and the recoil velocity translates to snappiness.
Here is one reference for east viewing:
I just used the above table, so if you do any calculations and find out my numbers were crap, I’d be happy to listen.
And a couple calculators if you want to play around:
An online calculator that calculates the recoil energy, impulse, and velocity of a firearm according to the firearm's weight, powder charge, bullet weight, and bullet muzzle velocity.
shooterscalculator.com
Calculate the recoil for a rifle based on its weight and ammunition
bisonballistics.com
Sorry, thread drift and random place for the data dump, but I previously did some calculations for some of my long guns and possible purchases. I think it’s interesting how much gun weight influences felt recoil. I also think it’s interesting how much f***ing hurt a magnum Turkey load gives the shooter. Worse than a magnum bear slug.
Mossberg 500 - 12 Gauge (7lbs)
3" Hevi-shot Magnum Turkey Blend
-- Bullet weight: 875gr
-- Bullet Velocity: 1200 fps
-- Powder charge: 34gr
-- Recoil Impulse: 5.42 lbs/sec
-- Recoil Velocity: 24.9 fps
-- Recoil Energy:
67.44 ft/lb
3" Brenneke Black Magic Magnum
-- Bullet weight: 602gr
-- Bullet Velocity: 1502 fps
-- Powder charge: 30gr
-- Recoil Impulse: 4.68 lbs/sec
-- Recoil Velocity: 21.51 fps
-- Recoil Energy:
50.35 ft/lb
2 3/4" Federal LE Hydra-Shok Rifled Slug
-- Bullet weight: 438gr
-- Bullet Velocity: 1300fps
-- Powder charge: 26gr
-- Recoil Impulse: 3.11 lbs/sec
-- Recoil Velocity: 14.27 fps
-- Recoil Energy:
22.16 ft/lb
LMT MARS-H - 6.5 CM (9.5 lbs)
143gr ELD-X
-- Bullet weight: 143 gr
-- Bullet Velocity: 2500 fps
-- Powder charge: 33 gr
-- Recoil Impulse: 2.32 lbs/sec
-- Recoil Velocity: 7.86 fps
-- Recoil Energy:
9.11 ft/lb
Browning BLR - 6.5 CM (5.5 lbs)
143gr ELD-X
-- Bullet weight: 143 gr
-- Bullet Velocity: 2640 fps
-- Powder charge: 33 gr
-- Recoil Impulse: 2.41 lbs/sec
-- Recoil Velocity: 14.09 fps
-- Recoil Energy:
16.97 ft/lb (12.66 with 7.375lb rifle)
Browning BLR - 375 Raptor (5.5 lbs)
250gr TTSX Supers
-- Bullet weight: 250 gr
-- Bullet Velocity: 2200 fps
-- Powder charge: 44 gr
-- Recoil Impulse: 3.42 lbs/sec
-- Recoil Velocity: 20 fps
-- Recoil Energy:
34.19 ft/lb (25.5 with 7.375 lb rifle)
400gr Expanding Subs
-- Bullet weight: 400 gr
-- Bullet Velocity: 1000 fps
-- Powder charge:
12 gr
-- Recoil Impulse: 2.04 lbs/sec
-- Recoil Velocity: 11.95 fps
-- Recoil Energy:
12.2 ft/lb (9.1 with 7.375 lb rifle)
AR GPC (8 lbs)
77gr TMK
-- Bullet weight: 77 gr
-- Bullet Velocity: 2602 fps
-- Powder charge: 24.5 gr
-- Recoil Impulse: 1.43 lbs/sec
-- Recoil Velocity: 5.77 fps
-- Recoil Energy:
4.13 ft/lb
AR PDW - 300BLK (6.5 lbs)
110 gr TTSX
-- Bullet weight: 110 gr
-- Bullet Velocity: 2040 fps
-- Powder charge: 16 gr
-- Recoil Impulse: 1.35 lbs/sec
-- Recoil Velocity: 6.69 fps
-- Recoil Energy:
4.52 ft/lb
194 gr Expanding Sub
-- Bullet weight: 194 gr
-- Bullet Velocity: 1050 fps
-- Powder charge: 8.3 gr
-- Recoil Impulse: 1.09 lbs/sec
-- Recoil Velocity: 5.39 fps
-- Recoil Energy:
2.93 ft/lb
HK SP5 - 9mm (5.5 lbs)
90gr Xtreme Defender
-- Bullet weight: 90 gr
-- Bullet Velocity: 1634 fps
-- Powder charge: 6 gr
-- Recoil Impulse: 0.79 lbs/sec
-- Recoil Velocity: 4.6 fps
-- Recoil Energy:
1.81 ft/lb
147gr FMJ
-- Bullet weight: 147 gr
-- Bullet Velocity: 1070 fps
-- Powder charge: 5 gr
-- Recoil Impulse: 0.81 lbs/sec
-- Recoil Velocity: 4.73 fps
-- Recoil Energy:
1.92 ft/lb