I find the 550 pretty smooth to operate. My left hand is placing the bullet and rotating the shellplate as my right hand is grabbing and placing a case. Then my right hand is right by the pull lever to pull it. My right hand is usually back on the lever ready to pull by the time my left hand has set the bullet nice and straight. I personally like the fact that the 550 doesn't auto index. I do load the majority of my pistol on a square deal b but I don't think the 550 is much slower.


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