Quote:
Originally Posted by Albertacoyotecaller
I am going to try some 1680 today but would like to have a load with lil gun. I will also try the wc735 for it as well.
What confuses me about loading this 17 Hornet is I have data from Accurate listing 11.2 gr of 1680 as max with 20gr projectiles. I am reading an article that has them using 12.4 gr. That is a huge difference.
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Different rifle, different jump to lands, different lot of powder, different primers. The assumption that all manufacturers make all rifles with identical chambers, throats,etc, is nonsense, which is why the velocities measured often vary considerably from the velocities listed in the manual. Those variances in velocity, indicate that the pressure also varies from rifle to rifle.