I have a 450. I use WLL carnauba red. On everything I shoot. Tumble grooves, pistol, rifle, everything. I bought a lifetime supply.
I do not have a heater per-se. my 450 has a small base, and I set a dollar store iron on that. I got the optimum iron heat setting figured out thru trial and error and marked it. Now I turn on the iron and let it go 45 min and the whole setup is at the perfect temp ready to go.










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