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Load test 3 what do you think? UPDATED

 
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  #1  
Old 12-01-2012, 04:27 PM
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Load test 3 what do you think? UPDATED

Finally got decent enough weather to go and do another load test. In my last test, I had 3 loads that stood out, at 45.0, 45.2 and 46.0 grains of Varget under my 155gn Berger hunting VLDs. For those 3, I had the following notes

45.0: 0.46 MOA horizontal, no vertical
45.2: 0.403MOA nice 3 shot cluster
46.0: 0.452 MOA Nice 3 shot cluster (very slight ejector marking)


Today when I went out, I had 2 purposes, 1 to sight in my new Vortex Viper PST, and, 2: to do some load testing on those 3 loads. on the first goal, I did OK, I think I have the 100 yard zero pretty well figured out. On the second, well, here's where I need some help.


Conditions:
Cloudy/misting rain
Tempurature: 34 degrees
Wind: no felt wind

Here is my 100 yard target. Going from left to right are 45.0, 45.2 and 46.0 grains

The 45.0 loads were a waste as far as testing, because I used the 2 sighters and 3 rounds to get on paper. The 2 hits just to the left of the dot are the last 2 shots at that charge weight.

The 45.2gn shots formed a horizontal line 0.73 MOA long, about .5 MOA low

the 46.0gn shots formed a 0.423 MOA group 1 MOA low.

I adjusted my zero .75 MOA, splitting the difference between the 2.

Here is my target at 200 yards:

I used the bottom left corner of the square for point of aim.

The 45.0 loads formed a group that was 1.45 MOA, with one shot landing off the papoer. the center of the group was 2.434 inches low

the 45.2 loads formed a 0.36 moa (.75in) group. the center of the group was 1.9 inches below point of aim

The 46.0 group had one called flier, making for a group of .88 MOA (2 of the rounds were touching). The center of the group was 2.4 inches below point of aim.


Any thoughts? I'm really starting to think that 45.2gn is my load, but that flier on the 46.0 load has me questioning thatt.

Last edited by emn83; 12-01-2012 at 06:29 PM.
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  #2  
Old 12-01-2012, 07:04 PM
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Re: Load test 3 what do you think?

I would re shoot the 2nd and 3rd group again, can you shoot those at 300yards?
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Old 12-01-2012, 10:22 PM
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Re: Load test 3 what do you think?

Quote:
Originally Posted by Bob L. View Post
I would re shoot the 2nd and 3rd group again, can you shoot those at 300yards?
That's what I was thinking too. I can shoot 300 at my range. it goes to 450, I've been stepping it back incrementally as my confidence goes up. after this last outing, I'm starting to feel pretty good. The rifle has been doing awesome. Think my next test will take her out to 300 and see what happens. have to wait for good weather again. My car doesn't make it all the range, so it's walk in, walk out, and walking to place targets, bad weather is no fun
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Old 12-01-2012, 10:39 PM
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Re: Load test 3 what do you think?

I'd reshoot, and throw in a 45.6 group. I suspect you'll see that the trend continues and 46.0 is the smallest.

I assume (?) you tried over 46?
46.3 might be interesting and I suspect you'll see it widen up a bit.
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Old 12-01-2012, 11:27 PM
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Re: Load test 3 what do you think?

Quote:
Originally Posted by Dr. Vette View Post
I'd reshoot, and throw in a 45.6 group. I suspect you'll see that the trend continues and 46.0 is the smallest.

I assume (?) you tried over 46?
46.3 might be interesting and I suspect you'll see it widen up a bit.
I have gotten ejector marks intermittently at 46.0, which is why I kept that as my top load weight.


I just loaded 5 more of the 45.2 and 46.0. When I shot before, I did shoot a 45.5, and it grouped quite a bit bigger than the 45.2 and 46.0...I may load up a few at other weights just to see though...tomorrow is supposed to be nicer weather, so I may try some 45.6 and maybe a 46.3, just to re-check at those weights. Going to try at 300 yards if i go out tomorrow
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Old 12-02-2012, 12:15 AM
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Re: Load test 3 what do you think?

I am with Dr. Vette,

Might just pay to try 45.6 again, one more time just to confirm if nothing else. I'd try it along with 45.2 and 46 under ideal wind conditions at 200 or 300 yds.

Good Luck and let us know.
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Old 12-02-2012, 12:26 AM
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Re: Load test 3 what do you think?

I think you are to a point where 3 shot groups aren't enough to make a quality decision.

I'd suggest going a bit over 46 grains but if you are at maximum you are at maximum. The reason for the suggestion is that I have found when the group is horizontal as with the 45.2 - 100 yd group then symmetrical as the 46 - 100 yard group, the next step up may well shot a vertical tread. Showing the load the rifle likes as the 46 grain load.

The 200 yard targets show a bit of a shift in the formation of the 45.2 grain load from horizontal to vertical. A lot of things could cause that.

The 200 yd 46 grain load shows better potential than the 45.2 grain load. Why the flier? Who knows?

I'd consider loading 5 each of the 45.2 and 46 grain loads and shoot them round robin being calm cool and collected the whole time. Then make the decision.

In reality you can't go too far wrong for hunting purposes with either one.

Don't shoot too much. A callus on the trigger finger causes fliers.
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