Anyone ever see this?

[Hemingway]

I saw today in the Glock annual that they sell different sights to accommodate different types of ammunition. What the heck does that mean?

 

[Doug]

Beats me
Different bullet weights?
Heavier bullets DO shoot higher.

 

[throttletony]

Not much help here either...I'm having trouble understanding why you would want this on a glock (or 90% of all pistols for that matter)

 

[IndianaResident]

Different sights like...higher ones for suppressors maybe using subsonic ammo? That's a stretch....

I could see where you'd want different sights with blanks, or if you maybe have explosive rounds for IDF you'd want some sort of leaf sight.

 

[Caldad]

Bullet rise will differ due to several variables, just like when shooting a rifle. Most significant variables are Bullet weight and powder charge.

I have an LCR that was shooting extremely high with factory Federal ammo. The ammo was super hot even though it wasn't +p... even hurt my hand to shoot it. I started reloading 38spec , and found the perfect load that is consistently accurate, and hits where I'm aiming using the same sights configuration that hit high when using Federal ammo.

 

[686 Shooter]

Bullet rise will differ due to several variables, just like when shooting a rifle. Most significant variables are Bullet weight and powder charge.

I'm sure someone will correct me if I'm wrong, but I think the only two variables to cause a bullet to rise is a powder charge significant enough to propel the bullet out of the barrel and the barrel being pointed at an upward angle.

 

[shooter521]

Glock has 4 different heights of rear sight: 6.1mm, 6.5mm, 6.9mm and 7.3mm. The height is denoted by horizontal markings on the side of the sight body. Per the Glock Armorer's Manual, each incremental change moves the bullet impact approximately 2.4" at 25 yards for a Glock 17.

Certain heights are standard for certain models, but a different height may be fitted from the factory as a result of test-firing.

 

[Hemingway]

Thank you!

 

[Caldad]

I'm sure someone will correct me if I'm wrong, but I think the only two variables to cause a bullet to rise is a powder charge significant enough to propel the bullet out of the barrel and the barrel being pointed at an upward angle.

Other lessor variables: type of primer used, burn speed of the powder used, depth the bullet is seated (more than a 'lessor variable'), crimp... anything you can do differently when developing a load that will effect pressure. Of course the gun has to be angled upward, since the bullet is being effected by gravity from the minute it leaves the barrel... the entire reason for replaceable front sights of varied heights, since the rear sight is fixed. However, the more pressure (due to the several variables mentioned), the higher the speed the bullet travels, the faster it moves the less time gravity has to work on it prior to impact, which equals more/or longer distance of travel before the highest part of the trajectory (travel over zeroed point of aim/rise) is reached.

Simply a higher pressured load will make the bullet impact higher on the target than a lower pressured load (with the same point of aim), and there are multiple variables to pressure. Even the lessor variables, because there are so many will add up, and have a noticeable impact.

 

[Doug]

I'm sure someone will correct me if I'm wrong, but I think the only two variables to cause a bullet to rise is a powder charge significant enough to propel the bullet out of the barrel and the barrel being pointed at an upward angle.

Another important variable with handguns is the shooter.
No two shooters hold the gun exactly the same. There are variations in how much and in which specific direction(s) the gun moves when fired. With one strong, bulky shooter, the gun may hardly move at all; with a more lightly muscled shooter who holds the gun less firmly, the gun may move quite a bit.
The important thing to remember is that recoil starts at the instant the gun is fired and moves the gun before the bullet leaves the muzzle.
This is why no one else can truly sight in your gun for you. They might get it close, but there will always be differences.
This effect is more pronounced with increasing recoil and decreasing gun weight.