That won't be necessary sense he is loading a single shot H&R.
Dan you may not be able to reach the lands in your H&R as many Handi rifles, the NEF counterpart and same rifle, are notorious for having long throats. If you load them according to the recommended OCL you should be ok. I load for the exact same rifle, and I can't reach the lands with 50gr V-Maxs.
If the recommended OCL doesn't shoot well, then back them out a hair, but try it first.
Loading for an single shot is nice, if your cases are sized and go in flush with the breach, you can seat out a bullet and visually see if you have reached the lands as the cartridge won't go all the way in the chamber. Again assuming your cases are sized correctly.
If you need more info on loading for them check out the NEF/H&R Centerfire forum.
Smoking a dummy round is still the way I use, and use a oil lamp with the wick pulled out farther, it really suets up a bullet really qucikly.
You will also find that certain bullets will have a longer OCL to touch the lands when loaded as they have a different O-Give. Like a difference in a bullet like a blunter Remington Core-Lokts and long sleek Nosler ballistic tips.
O and welcome to GBO, and to reloading.
-Aaron