Penalty for for having to shoot down a tube?

[BraselC5048]

Originally Posted by Anthony

I would just subtract the bullet diameter from the target diameter.

And would that increased modifier count against the 22+2x Acc limit? (Hopefully not? It's a low Acc weapon.)

Humm, dawned on me that the distance from edge of the bullet, if centered in the target area, to the edge of the bullet, if exactly on the edge of the target area, is always half the width of the target area. I don't know how I was counting it before, but it cut the "safe distance" of how close you can place a bullet to something you don't want to hit roughly in half.




Going back to the "down the tube shot:" He's got DX based skills high enough to make a skill roll at -7 to line it up, essentially the 2" size modifier for the area needed for the weapon to be in with +2 for a round target, and OK odds at -9 if the +2 for a round target doesn't apply. Would a DX/skill roll to "line it up" work that way?

Also, without the +3 for speed and range being known precisely (I was wrong about that), that drops the non-combat modifiers to just +5. If the "lining it up" penalty is -5 or less to the shot on top of size/range, he's good, but if it's any higher, the odds go south quickly.

-5 penalty, more, less, nothing but included in the DX based roll?

[Anthony]

Originally Posted by BraselC5048

And would that increased modifier count against the 22+2x Acc limit?

Yes, it's a normal target size modifier.

[Green-Neck]

If one were to get really pernickity the bullet is falling inside the tube earthward at 9.8 m per second per second. So velocity also plays a part in the effective target size, although admittedly probably below gurps resolution.
In my opinion as a shooter, firing at a known range is not about changing your sights, but being able to calculate hold over/under. One almost never has the cross hairs where one intends to shoot.

[sir_pudding]

Originally Posted by Green-Neck

One almost never has the cross hairs where one intends to shoot.

That wasn't how I was trained.

[Green-Neck]

Originally Posted by sir_pudding

That wasn't how I was trained.

. There are different styles, I'm a hunter, not military. The point I'm trying to make is i wouldn't disallow the +3 for a known range because someone had fixed sights.

[sir_pudding]

Originally Posted by Green-Neck

. There are different styles, I'm a hunter, not military. The point I'm trying to make is i wouldn't disallow the +3 for a known range because someone had fixed sights.

So adjustable sights do nothing?

[BraselC5048]

Originally Posted by sir_pudding

So adjustable sights do nothing?

Originally Posted by Green-Neck

. There are different styles, I'm a hunter, not military. The point I'm trying to make is i wouldn't disallow the +3 for a known range because someone had fixed sights.

Hypothetically, if you're using a low tech weapon that doesn't have a sight (a bow, for example), do either of you think the bonus would still apply?

[sir_pudding]

Originally Posted by BraselC5048

Hypothetically, if you're using a low tech weapon that doesn't have a sight (a bow, for example), do either of you think the bonus would still apply?

There are adjustable bow sights. Without an adjustable sight I don't see how precise range can help at all, and Tactical Shooting p. 27 seems clear to me. Aiming by "Kentucky windage" and good zero alone is just regular sighted shots, IMO.

[Anthony]

Originally Posted by sir_pudding

So adjustable sights do nothing?

I'd consider reducing the +3 to +2, though it's reasonable to think that they have no effect at the granularity of GURPS. The actual effect should be a slight increase in speed, because 'is the target in the exact position in my sights theory says he should be' is easier if that position happens to be the center.

Originally Posted by BraselC5048

Hypothetically, if you're using a low tech weapon that doesn't have a sight (a bow, for example), do either of you think the bonus would still apply?

Yes, it should apply; while lack of a sight hurts, rangefinding is way more important with low tech weapons than high tech weapons.

[sir_pudding]

Originally Posted by Anthony

I'd consider reducing the +3 to +2, though it's reasonable to think that they have no effect at the granularity of GURPS. The actual effect should be a slight increase in speed, because 'is the target in the exact position in my sights theory says he should be' is easier if that position happens to be the center.

Yes, it should apply; while lack of a sight hurts, rangefinding is way more important with low tech weapons than high tech weapons.

Precise range measurement (and precision measurement in general) are TL5.