crazy_train04--I have not shot the .223 WSSM, but I do own and have shot a Savage 12VLP in the new .204 Ruger caliber. The factory Hornady 32 gr. V-Max cartridges leave a great deal to be desired in the accuracy area. Although, to be fair, I am getting 5 shot groups that are just a tad over 1". The factor fodder is averaging around 4,090 fps at the muzzle. I have been spoiled by my .17 Remington rifle which is a tack driver with my reloads.
I did try some once fired Hornady .204 casings and shot a .390" three shot group with the 32 gr. V-max bullet and the average muzzle velocity was about 3,860 fps. I am going to try to get that velocity up around the 4,100 to 4,200 fps range if I can maintain well under 1/2" accuracy.
The Remington 222 Magnum brass is not very difficult to fire form. I have posted this information before, but I'll repeat it here with a photo. I take a 222 Mag casing and run it into my full-length sizing die just enough so it sizes a bit of the neck so when the casing is chambered, the donut crush fits against the .204 Ruger chamber. The main reason for the crush fit is to avoid a headspace problem. The rest of the neck is left at the stock 222 Mag size.
On the first five casings I fire formed, I used the 40 gr. V-Max bullets the bullets so they were about .002" into the lands. I used a load of 27.0 gr. of H4895 and the casings formed just great!! The average velocity was about 3,710 fps. The five-shot group was 1.375".
The last 27 casings I fire formed I seated the 40 gr. V-Max bullets about .007" off the lands and increased the load to 28.0 gr. of H4895. The average muzzle velocity for these 27 shots was approximately 3,880 fps. The casings formed just fine, but the primers were flattened. I will back off on the powder load to 27.5 to see if I can get around 3,775 fps. I want to use these fire forming loads on prairie dogs. The 27 shots gave me a group that was in the 1.5" neighborhood, but I think if I back the powder charge down a bit, I may get groups closer to the 1.25 to 1.375" area and I can hit prairie dogs with that accuracy at 100 yards if they are standing up and at 200+ yards if they cooperate and lay horizontally for me /ubbthreads/images/graemlins/laugh.gif
