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My 264 loading notes
I have finally got a load,thanks to John Barness.I used his Handloader article as a starting point.Understand my rifle chambering is different than his factory Westerner,more throat.So I will not give how many grains I used,these rifles can be tricky enough.This is my second barrel,a Douglas, on this '68 FN ,it was a NIB.The first barrel,the FN, walked and was all lands,too high a friction barrel for a touchy cartridge.
The bullet I used was 140 SST,a boat-tail,for less barrel friction.In .308 180gr they have been very accurate for me.
H-1000,my lot acted more like H-4831 with the FN barrel,it spiked and popped a primer at the starting load,even at lower loading it wasn't as consistant as IMR-7828 .
N-560,nice and consistant in the walking barrel,targets could be layed on top of each other.With the second barrel velocity topped out at 3050,next loading of one more grain 3050.I thought I better try something else.
IMR-7828 give the velocity,but not enough accuracy for a long range rifle.
Rl-25,I got the velocity (3150) but it didn't group And each shot went faster in the groups,likely from barrel heat.
Retumbo at 3150 it didn't group,and it seemed a bit high on pressure.My primer radius was a little less.Both Mag-Pro and Ramshot Magnum were more promising.
Mag-Pro,I got the velocity and the second best groupings.It may work for you.With my lots of powders,it was one grain faster than Ramshot Magnum.
Ramshot Magnum,I got 3200,half rounded primers,and under MOA with two touching.What more could you ask for.It was sure hard to find Ramshot Magnum in Canada.Rayner-Shine had it at the Kamloops gunshow.
I hope this helps other 264 club members.
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You can hunt longer with the wind at your back
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