How many rounds per group?

[matai]

So I've been doing a lotta .22lr target shooting lately and am just wondering how many rounds do you guys typically shoot for a group?

I've just been doing 10 rounds because thats how big my mags are. I'm shooting at 1" orange pasters.

Also what would be a pretty good group size for .22lr at 25, 50 and 100 yards??

Thanks!

PS This is with a scoped Ruger 10/22 that's been modified quite a bit

 

[mesinge2]

It is usually measured in groups of 5 shots from the center of the holes the bullet makes using a caliper, not the edge of the holes.

http://www.midwayusa.com/viewproduct/?productnumber=604242

_

 

[Red State]

From other threads, I have seen people boasting about .3 and .4 inch groups at 50 yards. Anything under .5 inches is pretty good.

I believe that those are 5 shot groups, but I am not sure.

 

[matai]

Cool, so whats the best way to measure groups, do you use calipers from the center of the two furthest holes??

 

[dispatch55126]

5-shot groups are the norm but I usually shoot 10-shot groups as that is what my Savage MKII holds. 5-shot groups will better show where your bullets are hitting as 10 rounds may just tear a large hole but it still works for me.

 

[PT1911]

five shot group... measure from the farthest clean edges and subtract the bullet diameter for the best measurement... estimating the center of the bullet's hole is NOT a precise measurement. It is also best to shoot with some sort of backing to prevent tearing and measure the group on a flat surface and you can usually see the black residue of where the bullet went through the paper... so there ya go... farthest two shots minus the bullet diameter... measure with calipers if you can.

 

[Howard Roark]

50 yard NRA smallbore targets have a 1" 10 ring. 100 yard NRA smallbore targets have a 2" 10 ring. International targets are half these sizes and most every smallbore match has both targets so the rifle must shoot to the smaller 10 rings. 20 shots per yard line.

 

[Hud]

Matai,

A lot of guys are using this to measure their groups.

http://www.6mmbr.com/ontargetsoftware.html

 

[husker]

------------------------------5-----------------------------------------------------

 

[Legionnaire]

Five shots. Outside edge to outside edge minus one caliber (bullet diameter).

 

[wally]

Five shots helps keep groups small.

IMHO ten is the minimum to approach statistical significance in terms of the gun/ammo POA/POI dispersion.

--wally.

 

[lionking]

After reading through the years on this forum I have decided to do both 5 round and 10 round groups throgh most of my rifles.

Unfortunately due to my skills and or the rifle heating groups of more than 5 rounds usually expand. So when I shoot a nice 5 round group it is nice to be able to say hey look at this but after 10 really relects what I can do with it specially a military type/milsurp.

I recently took out my Garand and shot a nice 1 and 1/2 5 shot group at 100yds but when I shot a full 8 round clip later my groups always expanded to at least 3 inches.

 

[giggitygiggity]

Usually 5 rounds for rimfires. Usually 3 rounds for centerfires.

 

[Vern Humphrey]

In general, group size is proportional to number of rounds fired (up to about 10 rounds.) If 3 shots gives you a 1" group, expect 1.4" for 5 rounds, and about 3" for 10 rounds.

 

[benzy2]

Statistically, and this is just statistically, a minimum sample size to be significant is 30. Most people, myself included, tend to not shoot that many shots. I do mainly 5 or 10 round groups but occasionally will shoot a 30 rounder if I want to really see where the center of the group sits. I find the larger number of shots the closer I find the true center of the group.

 

[Shadow 7D]

You need to learn population approximation from a small sample, sorry I'm taking statistics this semester. Or base your data off 6 targets.

The other easy way to measure is from the inside edge to the outside of the other, that automatically gives you center to center distance with out the math.

 

[R.W.Dale]

The other easy way to measure is from the inside edge to the outside of the other, that automatically gives you center to center distance with out the math.

But that only works for groups with paper separating the bullet homes. Truly great groups still require math

 

[Clipper]

I shoot 3-round groups for a couple of reasons. First, I will be shooting from a cold barrel in the field. Second, I have less trouble with locating individual bullet holes, as most of my fliers are called, and it's easier to find 'em that way.

I get a 30-round average (if I want one) by shooting 10 3-round groups and doing the math.