Yes, a 21" would be about perfect. I climbed a lot of trees with a 24" on my 7 mag and that barrel caught on near everything. The 18.5" on my 742 carbine was better for tree climbing, but a little loud on the back side. I cut a .35 Remington down to 19" for a walk around rifle, but when I built up a custom 7mm-08, it has a 20" with a #1 taper. If I built it again it would have a #2, but that 20 or a 21" would be about ideal.

My other auto is a .45

The bitterness of poor quality is remembered long after the sweetness of low price has faded from memory