Originally Posted by BobinNH


Bobnob: interesting because I have never seen that much H4831 recommended with a 150 gr bullet. The velocity is very good, too. Got a feeling lots of little things added up there...does the SST have short bearing surface maybe?

Other things to consider besides the powder are what kind of barrel was that? Were you throated on the long side? That's a barrel I would like to slug for groove diameter. A loose barrel and longsih throat can take heavier powder charges than a tighter barrel IME.

Little things we don't consider sometimes add up.


Yeah I've mulled some of those things over in the past. I've never slugged the bore, but the throat isn't long. I can get into the lands with the 150g SST with the mag length a generous 3.375-ish.

The loose bore diameter is a possibility. I got around it by just adding more 4831, then going to H4350 before more recently with the R17.


Rifle is a Zastava aka Interarms X. It's an accurate rifle with 1.25moa with the worst of loads and a good 0.75 with a lot of loads.

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