Reload Question

alinrut

Active Member
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210
.300 WSM being set up with 180gr Nosler Accubonds..

2 weeks ago I shot this set up loaded with 63 grains of powder and got 2807fps

Today, I shot 10 rounds... 5 at 63 gr and 5 at 64 grains...
The attached photo is the final result..
1st shot out of 63 gr and I was at a 500fps increase with exact same load and it steadily decreased with each shot... any ideas why?
Screenshot_20200510-091937_Samsung Notes.jpg
 
chrono problem.....I don't think that 300wsm will ever push a 180 grainer to anywhere near 3400 fps


unless you are just filling the cases with a table spoon I just can't imagine that kind of spread. That has to be a chrono problem

That 1/2 MOA accuracy at 200 yards don't happen with velocity spreads like that
 
Cleaned the gun last night, prior to shooting this morning...
And yeah, the 3300 fps surprised us, using a dialed in powder dispenser and was meticulas in filling the casings... left the spoons in the kitchen lol...
I am thinking chrono problem as well... just doesnt seem right to steadily decline 1 round after the next..
 
Chrony Alpha...
We believe our error was shooting 1st thing in the morning on a clear blue sky day... the sun rising and shifting made the "shades" in effective... we are gonna go back late afternoon on a overcast day and see if that changes things
 
Yep,
My last shot on Saturday morning said my 6.5x284 shot 3996 fps! :oops: :oops: :oops:
Pretty sure the sun was playing tricks on my Chrony!
Wish I could afford a Labradar.
 

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