Originally Posted by kraky1
I have a really fussy 300 wby mag ultralight that loved 86 grains of retumbo under the 200 ab. This gun was a real pain in the ass and I was about to rebarrel it when this load showed great promise. REMEMBER this wby has freebore....does your Remington?? You may have to start quite a bit lower and work up. I would recomend that you start by loading at "clip length" and work back if accuracy not what you want....maybe .025" at a time.
I agree with your question about whether Remingtons have the freebore or not!
I don't think they do,mine didn't anyway! I added it myself,just on 1/2" was what a factory barrel was that I measured,so that's what I did to mine.The only way to know if you have freebore is to load a dummy round with the bullet out extra long,chamber it and see if the bullet is pushed back into the case.
I couldn't even use factory rounds,they blew primers;It also might have been caused by very hot weather over here,I'm really not sure!I only fired 1! The bolt locked up,and I couldn't open it in the field! I had to put it in a vice to get enough torque on it to open it.I sold it not long after I lengthened the throat.I did play with a few loads,using RE22,H1000 and H4831sc.
Before I increased the throat,I couldn't get anywhere near max loads out of any of my manuals,it ran up to 5grs less with pressure signs.
My rifle now is a Winchester Mod 70 switch barrel,it has freebore,so I won't post any loads until Lamiglas has his chamber and throat measured.