There is a lot of opinion on this subject, and it has been hashed out on this site ever since I have lurked here. My experience has been favorable toward BLO. I don't hunt in downpours so can't vouch for that, but have been in drizzle and bushes with plenty of dew. No problem. Some time ago I posted a test I did on a GPR stock with a drop of water maintained for quite a period of time. BLO finish, more than 5 yrs old, no swelling or discoloration. A couple of months ago I freshened the finish with BLO. I have never used wax. Here is a 36 hour test.
Water drop maintained in place, 36 hours, temp, 72* F.
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# 2 some discoloration. May be minerals from drying?
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# 3 rubbed with palm, no magic incantations, no potions, no special orders to some supply house , no waiting weeks, months for an order to be filled.
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Do as you like , be happy with what you do. Just my experience.
Dave