Sierra 223 kbullet difference

[PeterN]

I finished a 500 box of 77gr MK and started on a new box. The new lot is 002 shorter in OAL and almost .002 shorter base to ogive. The weights are all the same. I have not tested accuracy yet. Has anyone else seen this kind of dimension difference between lots of Match Kings?

 

[DocB]

Re: Sierra 223 kbullet difference

Peter,

When the difference exceeds 0.020", you've got room to bitch.

Have fun,
DocB

 

[MALLARD]

Re: Sierra 223 kbullet difference

.002 isn't bad. I'd be happy if that was all i got out of 500

 

[Beef82]

Re: Sierra 223 kbullet difference

I've seen way bigger differences in OAL in the same box of 100. I think its mainly in the meplat, but its one of the reasons I haven't spent the time to develop a load with SMKs. I may try again someday.

 

[TexIndian]

Re: Sierra 223 kbullet difference

I just measured 1,000 168 SMKs (.308) by base to ogive with a Sinclair sorting tool. I sorted them all into groups of .001 and here is what I got:

 

[X-fan]

Re: Sierra 223 kbullet difference

Oldtex,

I bet if you shot those sorted bullets at 600yds you couldn't tell the difference in POI.

Would be interesting to see though.

I get more reduction in vertical by uniforming the tips than by weight or length sorting...No idea why.

Peace

 

[gunsnjeeps]

Re: Sierra 223 kbullet difference

They change lot to lot. As long as they fall in a certain range overall they pass QA. Don't worry about it shoot them.

 

[armorpl8chikn]

Re: Sierra 223 kbullet difference

What kind of benchrest competition are you using the 77gr Match King?