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Imr 4955 in the .284 win


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Has any body tried this powder at all, ran some in my 300 wm same thing pressure spikes bad es before usable velocity.

Noticed a big difference in the kernel sizes too and the fact they wernt evenly dispenced from the chargemaster, bigger ones 5mm + sticking a bit in tube then a few would drop together, so you had 2 consec drops 1 with lot more of the v small kernels 1 with the bigger ones, would this effect the burning speed, creating the speed jump and pressure spike - its bound to have an effect on case fill levels too.

 

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