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A little fun with 308

wvbearhunter

wvbearhunter

Well-Known Member
Joined
Feb 10, 2023
Messages
694
Location
West Virginia
I have two loads above this but the accuracy fell off and I have not re-tried them after adjusting my seating depth. These were fired at 200 yards using a Tripod with me sitting in a folding chair. Sig Tango 6 4-14×44, BHO with 20" PVA barrel.
195 grain Sierra TMK
Fed LR Mag Primers
Viht N-550
New Fed Brass
2.880" OAL

I am, by no means, an expert but this load, in this rifle, makes me smile.

I used the cheap 147 FMJs to get my baseline.
20241027_114136.jpg
 
I am curious if you were actually doing load development at 200 yds? I've never done load development at extended ranges, except ladder testing for velocity nodes, before owning a good chronograph. It seems to me that the risk of the wind kicking up could have adverse affects on the groups at that range. I never hold for wind in any accuracy testing so to maintain all the constants that I can.... maybe there is something to be learned from this approach. Please share.

BTW- those are great 200 yard groups. Good shooting!
 
Bang4theBuck said:
I am curious if you were actually doing load development at 200 yds? I've never done load development at extended ranges, except ladder testing for velocity nodes, before owning a good chronograph. It seems to me that the risk of the wind kicking up could have adverse affects on the groups at that range. I never hold for wind in any accuracy testing so to maintain all the constants that I can.... maybe there is something to be learned from this approach. Please share.

BTW- those are great 200 yard groups. Good shooting!
Click to expand...
I my opinion vertical is what should be considered. I've done the same, powder charges as well as seating depth ( separate of course) just verifying for the least amount of vertical at 200 and also 300. It has proven to be a very reliable load.
 
Bang4theBuck said:
I am curious if you were actually doing load development at 200 yds? I've never done load development at extended ranges, except ladder testing for velocity nodes, before owning a good chronograph. It seems to me that the risk of the wind kicking up could have adverse affects on the groups at that range. I never hold for wind in any accuracy testing so to maintain all the constants that I can.... maybe there is something to be learned from this approach. Please share.

BTW- those are great 200 yard groups. Good shooting!
Click to expand...
I always test at 200. I have always felt that 100 does not give a true indication of accuracy
 
Last edited:
wvbearhunter said:
I always test at 200. I have always felt that 100 does not give a true indication of accuracy
Click to expand...
I agree. If you shoot a cloverleaf at 100yds, is the horizontal or vertical deviation part of the rifle's normal dispersion or a true indication of a horizontal or vertical component of the load developed? 🤔😅
 
To each his own, I guess. My opinion has always been that 100 yards was a good starting point, as it is far enough away to accurately measure groups and elevation differences. 200 yds is nothing more than an extrapolation of the same results, only with a higher possibility of wind and bullet BC affecting POI. I suppose if all you are looking at it vertical dispersion, the further the better. Seems more like personal preference than science. Thanks for the replies fellas.
 

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