Range day + New Load = your thoughts...

AndrewH

Private
Minuteman
Feb 12, 2013
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0
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so I was at the range and tried to work up a load for my Sako 75 finnlight 300wsm with 150gr TTSX and H4350 powder. Bullet is seated as long as my finnlight magazine will allow.

Results of the ladder... this was at 200 yrds unfortunately. I could not make it too my long range area due to high snow level still.

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#1 63.5gr no reading
#2 64gr 2915 fps
#3 64.5gr 2907 fps
#4 65gr 2992 fps
#5 65.5gr 2994 fps
#6 66gr 3077 fps
#7 66.5gr 3083 fps
#8 67gr 3141 fps
#9 67.5gr 3148 fps
#10 68gr 3220 fps
#11 68.5gr 3382 fps

I was totally confused with the ladder because it looked to me at if 2, 3, 4, and 5 were good spreads as well as 9,10, 11.

Not wanting to waste the day I sent off three rounds of each at 200 YRDS until I ran out of light. Here are the results with the averaged velocity.

200yrd results:

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What would you guys get from these results? I was very hesitant to start the group shots with the 63.5gr and 64gr loads as they gave me 30.06 velocity and well, I am shooting a 300wsm not a 30.06...

What Next?
 
Re: Range day + New Load = your thoughts...

You seem to be all over the map, except for that last group.

The OCW cluster won't tell you much.

Go with the last charge weight and shoot some five shot groups at 200 yds and perhaps 5 different groups and see what you see.

Chris
 
Re: Range day + New Load = your thoughts...

those are some pretty large groups for 200 yards. Do you feel like you were doing your part on all the shots? There is no shame in admitting you may be weak link in the equation. If you have a lot of experience and think you did all you could do on every shot then these results need to be looked at closely, if not then the results could be highly misleading. Those are some pretty erratic groups for 200 yards. although it looks like 65-66 has the best vertical.
 
Re: Range day + New Load = your thoughts...

I am pretty confident with the shots as they were off a lead sled...

Keep in mind that it is a factory hunting rifle with no bedding as of yet (McMillan on order)

I think that I will load up 5 rounds of 67, 67.5, 68, 68.5 and try again to see if I get a better idea of what is going on.