Shooting with a high power rifle takes consideration for the recoil impulse. .243 supplies a pretty good kick, which can dismantle inexpensive scopes simply because durability is a compromise at lower price points.

Leupold is is absolutely a good choice for your needs. Many will suggest saving a little more and getting the best scope you can afford, but if 300 is your max, your plan is sound. Other brands like Vortex have similar entries in that price range, but come with endless stories of failures. It’s a good thing they have a lifetime warranty!