Originally Posted by cgpro856
I'm reloading for a rifle for the first time and looking for some info. I have a SB2-833 .223 REM Ultra Varmint that shoots pretty well with Winchester 45gr hp white box ammo. I'm looking for the best accuracy I can get. I have read that you should seat the bullets out close to the rifling for max accuracy, so I measured the difference from the back of the chamber to the tip of a 55 gr psp bullet lightly touching the rifling. it is about 2.55" or .29" over the standard max length for a .223 cartridge. with the 55 gr flat base bullet that puts the bullet .05" out of the case before it hits the rifling.
Is this normal for the H&R?
Where should I start with COL?
Also, should I get a crimp die?
I found the same thing with my SB2-2S3 .223.
I found that my COL using 50 Grain Sierra Spitzer needed to be way over the recommended 2.210 inches leaving only .050 of the bullet seated in the case. I asked around and was told that wasn't enough so I decided to start with the recommended COL.
I worked up a load trying 2 powders that i had on hand. I tried Benchmark and IMR 4895 and the latter gave me the most accuracy. I am planning on trying some different loads using longer COL as soon as it warms up.
I ended up with 25 grains of IMR 4895, 2.210 COL, Winchester Primers, Remmington Brass, and 4 out of 5 under an inch. I thought that to be pretty good for a $140 gun. I had a hard time getting 3" groups out of factory loads (American Eagle, Remmington, and Wolf) with the same gun shooting off a bipod and sandbag.
I think crimping is mostly for shells that are going to be handled a little rougher. I don't crimp mine. I think you would need to buy bullets with the ring for the crimp.
I'd be interested in seeing your data after you find a good load and how you came up with it.
I see i am waking up an old thread, but it might do someone good.