howa-doing wrote:i need heavy slug loading data
i want to remain subsonic,,,,,,just over 1K fps
how heavy can i go.....i have 405g molds and factory 500g cast
but NO LOAD DATA
10g of unigue ''seems'' like a good starting place
and i have loaded 300g with 10g = a 44mag
but i want to see it in print first
my rifle is HOWA bolt [1 in 16 twist]...can on the way
I shoot the 405 gn RNFP cast bullets (powder coated) from my Ruger 16" with great success! My particular load is a super short 2.050" OAL and 10.8 gn of Unique powder with a standard CCI 400 primer. Puts me right at 1050 fps. Accuracy was decent/ acceptable at first but only got better as I experimented with the LEE FCD (factory crimp die). With the right amount of crimp added these loads now shoot fantastic! One ragged hole at 50 yards and usually 1.5" at 100yds if I can do my part. Load some up and have fun!
Dan
Edit to add: Let me elaborate on why I run such a short OAL. First, it eats up all the empty case volume, allowing for a better fill ratio. The higher the fill ratio, the better velocity consistency. Mine are VERY consistent across a chrono. Second, When I stick the big ole' heavy bullet out of the case, the cartridge nose dives into the mag and doesn't feed for crap AND just so happens the closer I tried to get to the rifling, the worse my gun shot. When I tried to single load and get anywhere near the lands, I would see fliers, so I worked down into the case. Since these bullets have lube grooves on them, I kept moving away a grove at at time and WA LA! It's important
not to line up the case mouth with the lube or crimp groove because these rounds headspace on the mouth so it
should not go into the groove when using a LFC die.