Hello: Picked up a used .223 110V last year. Loading up some .50 & .55 grain bullets I was able to get some groups sub MOA. I wanted to go to a heavy bullet for better mid range (300-400 yd) accuracy and loaded up some .68 gr. Match . According to the load data it pushes the bullet just over 2800 fps. The bullets all keyholed. Anyone have a clue as to why the heavier bullet key holed? The info I have is that the rate of twist on this rifle is 1 in 9 inches which should be good for .68 gr. projectiles. Powder, cases, primers all same as .50 & .55 grain loads. I am confused. Thanks for any input
Update. I measured the twist for myself. It is 1 in 14, and not 1 in 9 as stated in another blog. Mystery solved. Just goes to show that you can't trust all the info on shooting blogs. Oh well I can burn up the .68 gr. in my AR. Thanks to all for input.
Reply With Quote
Bookmarks