I'm wondering if I'm missing the point of the question. Is your concern that Handi's are too long throated for optimal use of this bullet? I am not aware of over long throating being much an issue in H&R products. And since that bullet is intended for use in standard M444 brass in lever guns, OAL is not too long for a Handi, so, it should not only be fine, but you may seat it slightly shallower for your Handi.