I have been shooting SK LR, Match, Center X and ELEY team and match. Just with the supply of ammo. I am having to lot hop. What would you say you would want your ES to be for rimfire. I’m going to try to do some lot testing in the fall.
Extreme Spread
- Thread starter TubbyT223
- Start date
My match ammo is all 25 or lower across 30+ round strings. Mostly eley, but some SK long range match. I have a lot of center X that is around 30 and shoots great.
I had 3 lots of tenex once that would all be 15-17. But they did not group as well as the other lots I was shooting.
I had 3 lots of tenex once that would all be 15-17. But they did not group as well as the other lots I was shooting.
My current lot of SK is 36.6 over 80 shots this morning. It does ok but loves to throw a 1130 fps and then a 1105 fps. On stages with small targets kinda far that has not been going well
I try to keep my ammo between 70-90 F. I use a soft-sided lunch "box" with nothing, ice packs or USB hand warmers depending on the temperature.
This lot of SK LR has not been great. At the time it was kinda get what you get and my chamber was cut for lapua/sk. I am now getting a barrel cut that is more in the middle of the road.
This lot and the ES works ok for PRS but we also have rifle league where you do kyl. This extremes on each end are screwing me.
In prs on a 3/4 ipsc at 200 it will shoot a wad the. The fast will be 2/10s high. Not a big deal on that size target but something smaller it’s off.
I’m more or less getting ideas on how to test the next lot.
Lot's of factors come into play at 200yds besides ES/SD. If I can get 20 to 30 with single digit SD over a 50 rd session I'm happy, unless those results don't match on target. Don't beat yourself up, 22lr would get boring if it shot sub moa @200 all day.
See this is the talk I like. Anytime I’m taking 200 and 300 serious it’s no wind and will ward them up at both. When it changes POI look at my Garmin and it is the extreme high or low.
This lot has a decent SD of 8 but ES is super high.
I agree with this. ES and SD are just data points. What really matters is what's on paper. What sucks is when you find that what's good at 50, but falls apart at 200 or what's good at 200 in 80 degree weather aint so much went the temps change to 60 or 90.
Another thing to consider is that your setup could be inducing higher numbers. ES and SD are arguably affected by consistency of ignition of the primer, which is affected by headspace and firing pin contact
50 yards can lie to you..in both directions..You can have stuff that looks amazing at 50(sk standard when you could get it), and will not be so hot at 100 and fathers.. You can also have stuff that is a mess at 50 (a lot of the norma lately) and it shoots well at a 100 and over..I think a lot of it has to do with how well the components are. My theory, I think sometimes the bullet itself has an issue, like the lead isnt uniformed around the axis, or something.. When you had great SD's and ES's and the paper doesn't show it, all i can think of..If something is good at 50, better than other stuff you are shooting, then when you go to 100 and 200 it is not as accurate there is an issue and you have a problem. We know that a bullet can't get more accurate going down range, so that means the said bullet is losing accuracy at a faster rate than the other lots you shot.. So even though the other lots you shot that were not as good at 50 as the one lot, they are able to stay closer the path you want it to be on over the time it was in the air. I hope I explained my theory well enough to be understood.
Care to elaborate on this?
I know only of a HV rimfire ammo that is often "junk" at 50 (compared with subsonic match ammo), but can compete at say 200 and over.
Can’t get much better on consistency. Ace barrel, RimX built and chambered by one of the best Smith’s in the country, cleaned every session, carbon ring removed verified by bore scope. So rifle isn’t an issue. Now the monkey hanging on to it can suck.
Small sample sizes lead to incorrect conclusions.
I shot 10 cartridges at 50 yards, 3/4 inch group.
I shot 10 more cartridges at 100 yards, 1 inch group.
Better moa at 100 yards.
Suppose you sent 50 shots at 50 yards,
then 50 shots at 100 yards? Do you think it'd hold up?
5 times larger sample to base y'er conclusion.
What if you used a 100 shot sample?
Yes, I've done this.
Random acts of accuracy do occur.
Skews the conclusion every time.
Continue the process to a statistically valid sample size,
y'er gonna find that the idea of better at long range than short
is optimism at it's finest.
Easy enough to prove.
Grab a brick of y'er favorite rimfire cartridges.
Send 50 at a single aimpoint at 50 yards.
Then 50 at 100 yards, repeat at 200 yards.
It'll be educational.
Might ruin an internet discussion topic though.
I shot 10 cartridges at 50 yards, 3/4 inch group.
I shot 10 more cartridges at 100 yards, 1 inch group.
Better moa at 100 yards.
Suppose you sent 50 shots at 50 yards,
then 50 shots at 100 yards? Do you think it'd hold up?
5 times larger sample to base y'er conclusion.
What if you used a 100 shot sample?
Yes, I've done this.
Random acts of accuracy do occur.
Skews the conclusion every time.
Continue the process to a statistically valid sample size,
y'er gonna find that the idea of better at long range than short
is optimism at it's finest.
Easy enough to prove.
Grab a brick of y'er favorite rimfire cartridges.
Send 50 at a single aimpoint at 50 yards.
Then 50 at 100 yards, repeat at 200 yards.
It'll be educational.
Might ruin an internet discussion topic though.
