Thread: Test load temps

Originally Posted by rusl

Chronograph is a crony beta master. So probably not the most accurate, 99.5% accurate if you belive the box

I'm no expert and only trying to experiment and learn. Just putting up my results if people are interested.

It might be all bollocks and jibberish but it does appear to have worked for me, 6 shots inside an inch and the 7th just outside, all over a backpack no rear bag so I imagine the shooting wasn't perfect. Im not saying that if I went and picked a random load and shot that it would shoot worse, maybe I'll try that next.

To me the loading up 3 rounds at each powder level and shooting a group then going off the smallest group makes no more sense, as its plenty easy to bring in shooter error and when your comparing 3x sub inch groups you can end up kind of chasing your tail.

I did note that the first shot was the slowest of the group but I don't think the chamber would have been hot enough after 1 shot to increase the temp of second round enough to make a difference.

Mate you are not looking at this subjectively. Its part of the human condition when you want something to work to then ignore basic principals to get the outcome you want.
You are claiming here that "it seems to have worked " when you have no control group. Nothing at all to compare it to. Look at my earlier post. The 10 shot method relys on finding a plateau
of velocity. To do this you need an accurate average velocity and you simply cant get that from one shot. Its statistically impossible. If you shoot 3 shot groups you will have a sample 3 times the size of one shot so it has some relevance. 5 shot groups even more.
Here is an example from some loads I put past the labradar for a mate going up in 1/2 grain increments. Ill list the first shot from each 3 shot group then the second then the third. Each will represent what you might see if you only fire one shot for the 10 shot theory.
First shot
2744
2805
2840
2905
2968

Second shot from each string
2783
2818
2881
2925
2969

Third shot
2747
2825
2867
2900
3007

Any combination of first second or third shot could make up the string for the 10 shot example. so its all just random .
Now if I list the averages of each 3 shot group we see a fairly consistent increase of 50ish fps for every 1/2 grain added. No plateau at all.

2758
2816
2863
2912
2981

Ill try and get to some more of your questions latter but my dinner is getting cold