Ref the mitre 10 gas torch - it's like everything that involves accuracy it's the process that defines the results more than the equipment you use. The flasher the gear the easier it is to get repeatable results and once you get repeatable results you can then make adjustments to your process to get the perfect result you need.
One of the hardest things with annealing cartridge cases is accurately measuring the temperature of the case to know if you are actually annealing it and what the result of your attempts actually are. I've done a bit of flame annealing and have the board and bits there to build one of the aliexpress annealers but it's an on-hold project while I have the buggered ribs and am limited for shooting ability. Not much call to anneal .22LR cases...
One of the first things I worked out is that my beautifully coloured cases that I flame 'annealed' and had that beautiful military Lapua-like annealing pattern on the case neck actually weren't much different than the uncooked cases. I needed to leave them in the flame for about another half a second or so to get the metallurgical changes in the cases. So close yet so far haha.
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