We all look at things differently, I know, but IMO $45 per barrel for choke reaming is by an expert is well worth it. mc hit the nail on the head about the "cost" of a botched reaming job. If you plan to do a considerable amount of it in the future, by all means invest in some training and equip yourself with the right reamers to do the job. If you just need a couple or three guns done, I'd farm the work out. I've had a few barrels' chokes opened, and have always been pleased with the results.

May God bless America and those who defend her.