Pop quiz!

[Ian]

All the same except powder charge. The group on the left had 2.2 grains more powder than the group on the right. What powder charge should I try next?

A) 1 grain more than left target.
B) 1 grain less than right target.
C) 1 grain less than left target.



All bullets weight sorted, "system" capable of 1" or smaller groups. Rocks are only concealing load data.

 

[462]

C.

 

[JWFilips]

B!

 

[Brad]

I would chose D, all of the above.
Why? Because I tend towards the shotgun approach at times.

 

[KeithB]

OK, I'll bet on my reasoning process and pick C. But I'd make it 1.1 grs.

 

[Ben]

B

Ben

 

[462]

Like many tests I've taken, a failure to thoroughly read the questions and think through the answers leads to mistakes.

 

[Pistolero]

I say "C".

 

[popper]

Depends - not the kind you wear.

 

[Ian]

Well, we're all in this together as students. Professor Rifle will be grading us tomorrow.

My money is on "C". However, since several of you picked "B", I loaded 10 of those as well as 10 of "C".

 

[Pistolero]

Only Mr. Target knows the real answers.

 

[smokeywolf]

If I have to choose from the A., B. or C., I'll choose C.

If it was me, my next loads would be 1 grain under and 1 grain over the load used on the right target.

 

[Gary]

I'd pick A simply to eliminate that as a choice if nothing else.

 

[Hawk]

I'd choose c.

 

[Spindrift]

I would expect your node to be around C. But I would probably have tested the other options as well

 

[fiver]

eliminating what doesn't work is as important as finding what does work.

left target isn't ignition inconsistency related, adding powder won't help it. [a primer change probably would be a bigger benefit]

right target could benefit from a little MORE powder, or it could respond to an oal change even better.

I know,,, neither one is on the list of choices, but that's how I would approach fixin them mo better.

 

[358156 hp]

Target 1 appears to be begging for more velocity, and A&B both cover that, and it doesn't look like slowing load 1 down would help things. Target B suggests that the velocity is too high. and that the rifle/load combination are possibly exiting a node. The next round of groups will tell you either way, so I'm choosing "B", primarily because I'm conservative.

BTW, does the first load have ten shots on it? I think I see two holes that could possibly have two shots through them.

 

[Rally]

I’m going with b. Seems odd the difference in shot strings. Horizontal on left and vertical on right? I’d be going down just to see if it settled down.

 

[Ian]

Keep it coming, the rationale behind everyone's choices is fascinating and educational.

Option "C" is the same as increasing the charge of the load on the right. A full grain might be too much but it's only a 3% change.

There are ten holes in each target, the one on the left has two doubles in the middle of the string which are difficult to see even looking at the target paper itself.

We had a bad thunderstorm last night and a constant, light rain ever since. Temperature at the range yesterday was 102 with a heat index of 108. It's 69 out there right now. If it lets up long enough I'll go shoot the groups but unfortunately the conditions have changed a LOT and sunlight on the barrel, barrel heating/cooling cycles etc. will obviously be quite different. Aren't "non deterministic" variables fun?

 

[JWFilips]

I alway pick "the lesser of two weevils" ( Master and Commander)