don't forget about imr 4759 mine like it at 42 grains with black sabots and 250 gr .451 nosler hollow point. may just be my barrel but it is very tight going down the barrel. makes you think it needs cleaning but it will shoot tennis ball size groups at 125 if i do my part. i practice on a piece of 1 inch pipe set at 60 yards and have whittled about 4 foot off of it in the last 3 or 4 years. you can see your vertical very easy and more than half inch in either direction and whoops you missed.