ok bud.....first suggestion....put the chrony away FOR NOW.....
You said remington factory was no good either......so you might have a finiky rifle to begin with.personally ANY reloading done from here on would be no more than 5 of ANY load till you can suss out what it likes....but you still havent established if its the load that is issue.my older brother has turned in some very respectable groups with his BLR over the years (the guys on range didnt like the short barrel and called it a flame thrower) the one we had indeed had horrible trigger (sucked and blew at same time) the trick is to accept it sucks and learn to live with it...get your rest super steady...try a sleeping bag under forestock and your off hand on magazine well,so its not pressuring forestock,take your time to get rock solid...rolled up jumper under toe of stock etc. you are after all testing rifle not self so any advantage to can create is gold.
again federal bluebox 100grn loads have good deserved reputation...believe chap on here uses them all the time on game.... they usually shoot nice tidy groups....so do twoforfrees so your one is unusual...Ive had 2 rifles in last 10 years that went to custard...both times it was the scope BASES themselves that were loose....
keep us informed and will keep trying to help.
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