Muzzle Rise Different on 3 Different Commanders, Why?

[AuProspector]

I have a "perceived large difference" in muzzle rise, in three 1911 .45 ACPs Commander Models, from 2 different mfgs, using the same ammo in each.

The 1911s weight are nearly identical with all steel frames. Less than 600 rounds have gone through each.

Two are from Nighthawk. (Talon II and T-3)
a.) The larger perceived muzzle flip.

One is from Wilson. (Professional)
a.) The least perceived muzzle flip.

I was wondering if anyone else has experienced this and what could cause such a noticeable difference.

Integritas
AuP

PS This is not one mfg is better than the other (since I own both) but as to what would be the cause of this? Shooting them side by side... Everything else being equal... It is very noticable

[AZ Husker]

Different recoil springs?

[Baba Louie]

Same weight recoil springs in each? FP stop plate all radiused the same at bottom?

If so, darned if I know.

[HAIL CAESAR]

One is a 4.25 slide and a Commander frame.
One is a 4.25 slide with a Officer frame.
One is a 4 inch bull barrel with a Commander frame.

Each weigh different amounts and have different weight distribution.

[HAIL CAESAR]

Also what are the hammer spring weights??? That with make a difference too.

[AuProspector]

I don't know what weight the recoil spings are. However, they are factory originals.

It could be Wilson's are heavier. I'm checking now on their forum's website.

If everything is the same (same recoil spring weight), then what.....?

(It's been bugging the heck out of me.)

AuP

[m2hmghb]

Only way to know is to buy a set of recoil springs from a manufacturer and a set of hammer springs of the same weight and install them in the two guns.

[AZ Husker]

Never hurts to change your springs anyway. Wolff includes a free firing pin spring with every recoil spring...
http://www.gunsprings.com/

[nolt]

my vote (as HC alluded earlier as well) goes to the weight of the meaty BB in the wilson reducing the flip.

[pistolwrench]

See post #4 for the definitive answer.

[cole]

Possible reasons:
1) Recoil spring weight
2) Recoil spring type (e.g. standard or variable)
3) Gun weight
4) Mainspring weight
5) Imagination