Heat-sensitive SKS


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Smokey Joe
April 19, 2006, 10:51 PM
Took Comrade Princess Anastasia to the range today. She is a new-issue Yugo 59/66 SKS--Yes I know she's Yugoslavian but she has a Russian soul. So far she is bone stock except for a peep sight replacing her military rear sight, and I stoned her sear some (needs some more but the improvement to the trigger is noticeable.)

The peep helped A LOT in accurate shooting. Had made up a series of loads, all the same .3115" diam 150 grain Hornady bullets (Hdy calls 'em .312 but they're not), CCI #34 primers, and an increase of 0.3 grains of AA1680 in each of 10 steps.

Some of the loads showed promise; most of them made 8" or smaller groups--the best were kind of a 4-5" group with 3 outer flyers--but Ye Gods how Temperature Sensitive!!! If I let her cool for 1 minute between shots she liked that, and the group stayed together moreso. The closer together in time the shots were, the worse she grouped.

Unfortunately I only figured this out for the last 2 loads of the series, so now I get to do the whole load series over again, but waiting 1 min. or more between shots.

Temp at the range was in the 60's F, sunny and breezy.

The only rifle I ever shot that was this finicky about cooling was a pencil-barrelled .243Win.

Anybody noticed similar, and/or have suggestions?

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Limeyfellow
April 19, 2006, 10:54 PM
That seems rather odd. Never had that happen to me before and it tends to maintain a 3-4moa firing far more rapidly.

cracked butt
April 20, 2006, 02:40 AM
Don't know if it will help or not, but its one thing that can be eliminated, did you remove or extend the bayonet so that it doesn't bear against the stock?

Smokey Joe
April 20, 2006, 11:03 AM
Cracked Butt--Not to make a pun or anything, but we'll give that a shot. :D

I had the bayo folded up the whole time.

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