found some 148 HBWC is this lubed?

I still have some of these. Looks like Bull-X brand. They made great bullets.

Should be. If it’s Bull-X it is old bullets. Looks swaged soft lead. Should shoot fine at wadcutter velocity.

I used to shoot thousands like those every year using the 2.7 grain Bullseye load. Go for it.

Swaged bullets with lube rolled into the soft lead. They easily expand to fit the chamber and barrel and should have minimal leading.

I bet they will be as accurate if not more so than the DEWC you have been using. Its hard to be the accuracy of a soft HBWC with the old standby Bullseye load. After you shoot that thousand and start looking for more, consider Zero Brand. I think last I bought were $70 per k with free shipping. Speer and Hornady make good HBWC's as well but are a little higher priced.

I believe they should be crimped in the groove above the grooved ring.

I believe that black, graphite looking stuff is lube. Not much of a lube is needed for low velocity wadcuters, I have even used ChapStick. I too would seat to the crimp groove and use a very light roll crimp(I think the flush seating became popular with the S&W M 52 and not necessary in revolvers).