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Literally came home from the range shooting my mates 21” 270wsm tikka. Shooting the Federal premium 140gr hybrid hunter the velocities were 3065, 3058, 3065. .25 inch group
I had a brief play with some load development loads for my 21" standard 270 today. Around 58.5 grains of Superformance will send an 140 AB at around 3060. I went up to 3110 but this was too high and starting to get a slight scrape.
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