For what it's worth, I have loaded my 8.25" SBR with 220gr Berry's and had, good results.
However, I used CFE BLK and H110, not 1680.
From 50 yds, 13.2 gr of CFE BLK gave me 1068fps and 1.25 moa, while 11.2 and 11.4 gr of H110 gave me 1051 and 1085fps respectively and also 1.25 moa.
1680 and...
I no longer have any Mosins but have a large supply of ammo.
2 sealed 440 rd cases w/ opener.
1/2 case opened
Lots of various different rounds, silver tip, yellow tip.
Many 5 round clips.
Well over 1000 rounds in pristine condition.
Offering at $500.
Located near Knox but can travel an hour or...
Well, I am planning on taking a Snipers Hide long range precision rifle course this summer.
I am currently working on trying to figure out what load I want to use.
It's a 26" 6.5 CM and I am loading and testing 135gr ATIPs, 140gr ELD-Ms, and 147gr ELD-Ms.
I have several months to get this worked...
Well, as I wrote before, of my 10 "budget" rifles, 7 are home builts and 3 are complete rifle buys.
Every one of them will fire when I pull the trigger and every one will shoot 1 to 2 moa out to 300 yards.
Too many "label snobs" around here with more money than sense if you ask me.