POI pb vs gc- Need someone to splain it to me?

[hc18flyer]

win .358 35-200fn(216 gr. gas checked) at 2000 fps hits on the nose with IMR 4895 and a 220 gr. point plain base at 1250 fps with Trail Boss hits 5+ inches higher at 50 yards? Powder burn rate?

[DougGuy]

Heavier/slower boolit spends more time in the barrel, forces of recoil lift the muzzle farther causing the barrel to be pointed upwards more when the boolit exits the muzzle, thus hits a higher point of impact.

[IDSS]

If it's anything like revolver shooting,it probably has to do with barrel time. The slower, heavier boolit is in the barrel longer as the rifle recoils. The muzzle is very likely higher when the slower boolit exits.

ETA
Dang. In the time it took to tuck in the kids, the answer came in

[Ben]

hc18flyer

Your observations are all about simple physics.

[canyon-ghost]

A slower bullet at the peak of it's arc is going to hit high. The faster bullet is shooting flatter but, you may not be zeroed for it's optimum distance. 50 yards for a rifle cartridge is close range, I do that with a handgun.

[swheeler]

Yep barrel time, the slower pbased is in the barrel longer and is being affected by recoil, usually more pronounced in handguns for me.

[Mik]

There has to be more to it than barrel time. Think of the math, for every force there is an equal but opposite reaction. So the force accelerating the bullet forward is equal to the force accelerating the rifle backwards.

If you are firing a 200 grain bullet in a 49,000 grain (7lb) gun you have a gun that is 245 times heavier than the bullet. It will therefore be accelerated 245 times slower. So, in the time it takes the bullet to travel 20" the gun will have moved .0816". If the bullet weighs 220 grain, the gun would recoil .0897" in the time the bullet travels 20". So a difference in recoil distance of 8/1000 of an inch. We all know the recoil of a gun isn't 100 percent horizontal , let's say half of it is straight back and half is vertical (wild guess). That leaves you vertical muzzle movement of 4/1000 of an inch. Does that account for your 10 moa difference? I don't know. Seems like it wouldn't.

I don't disagree, heavy bullets print higher, I just dont know how much of it relates to barrel climb.

http://m.youtube.com/watch?v=U_2gNhjAkjo

I don't see any recoil before the projectile leaves the barrel in this clip.