i'm rebarreling my remington 22/250 vls varminter cause its now a smoothbore with a kreiger s/s .224 1 in 8 twist palma. i need some loads,preferably using ar2225(retumbo) or bm8208 or possibly bm2. berger 80gns vld are the choice or if it hates them down to the 70gns vld.. as the barrel is 31" how long is too long before drag takes over? many thanks mikelightbulb