Nothing for nothing, same deal with my 260 walnut 18.5" old model. First range session, horrible. I noticed the action to stock had a wiggle with litle presure and everythng tied down. I bedded the action, floated barrel, not much better. Then bedded the entire barrel channel, (nothing to lose at this point) Blacken bottom of the barrel and eventually got even light presure down (1/8")the channel. Last range trip it was shooting dime 5 shot groups with VLD 140s. using Hybird. I think the pencil thin short barrel can really wip and "Toad" nailed it with stock fit. I plan to make this my walking deer rifle this year.
