You have to keep in mind that the commercial loadings of the ammo companies load their ammo to higher pressures so as to operate the many jamomatics out there that are probably cleaned once a year. Couple that with the insane desire of the average American shooter for those 1250-1400fps. loads which they think they need to shorten their leads and reach out to 60yds. to break a target and kill a bird.
One of my best friends and long time shooting buddies was an Executive VP, an engineer by trade, at a local defense contractor and did every test imaginable on our handloads and many commercial loads. One of his projects was developing a flechette round for the military. Pressure and velocity were very important.
Anyway, pressure DOES NOT affect recoil velocity does. A simple way to prove it to yourself is to go to any reloading manual and choose two loads with similar ejecta weight and load one with a velocity under 1200fps and near max pressure, say 10,000psi. Then find a similar load going say 1250+fps with similar pressure. Then, and this is important, have a friend load your gun with the test rounds, different loads in each barrel then hand it to you with the action closed. You will of course have marked the rounds to identify them then all you have to do fire the gun twice and compare the recoil. Pressure stresses the metal and recoil hammers the face of the stock and you.
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Wag more- Bark less.
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