I sold my little Miller 140 AS (115 volt) and ended up with an older Miller 175 (230 volt) with very low miles. Using C25 gas for the welder and I just stuck in the 175 a partial small roll of HB-28 .030 that was in my 140.

Just about out of that little roll and looking for something else. TSC has the Hobart brand wire .030 for $30 a 10 lb roll. Lowes has the Lincoln L-56 wire $40 for 12.5 lb roll, again .030. Sometime in the past I've used the HTP wire and had good luck so I could go that route.
I see the Lincoln wire is no longer Made in USA.

Since this model has no actual taps, can I adjust the voltage or wire speed when welding?

Suggestions on the wire?