.300wm 165gr SST LOAD

[jpbaker]

Hey, just another quick one. I need help with a load for my 300wm. I'm using 165 sst on H4831, however I cannot find any data for these bullets. (need a new book) any info would be appreciated. Tks

JPB

 

[Johnboy]

start at around 73.0gn's.a friend used the amount for a NBT.but cannot say if thats a bottom or mid load.

 

[backwoods83]

73grns is very tame, I set them .020" of the lands and used 75.5grns Imr4350, the equivilant to that is about 81grns of H4831 but i'd start at about 75, book max at 3.340" is 79.5grns.

 

[jpbaker]

OK tks guys,

Im kinda new to the whole reloading thing, but 79.5 sounds a bit much considering that on Hodgdon website they say:
MIN MAX
165 GR. SPR SP Hodgdon H4831 .308" 3.340" 72.0 2934 47,600 CUP 75.5 3055 52,200 CUP

I know not the same bullet, but..... Does this sound ball park? Im not going for speed, Im just trying to find a good accurate load.

TKS JPB

 

[backwoods83]

You have to have an old manual to get the truth, to many lawyers involved in the newer ones, if your looking for accuracy then your probably going to start loading at a longer oal to get you closer to the lands, rule of thumb with bt bullets is for every .100" further your out you will need 2.7-3.1grns more powder, obviously the lighter bullets get the 3.1 example take. What you want to load a 165 with 75.5grns at 3.34 if you load it to 3.44" that same load would be 78.6grns, this is to maintain the charge density. Iff accuracy is what you want use Imr4350 starting around 69grns and cci br2 or fed210m primers and not magnum primers, this will likely give you the best results in all aspects.

 

[jpbaker]

Tks for all the info guys, right now I have some loaded with 72gr 73gr 74gr of H4831 (only powder I got right now). Will use these loads to get a baseline and go from there....Are they hot enough? Remember its a SST 165gr. Im loading them to 3.50" any longer and my action will seat it for me .

I gotta get to the range and try these loads soon. I will be getting more powders and bullets down the road.

I know I know, im a newbie, but appreciate the help.......


TKS
JPB

 

[backwoods83]

Are you trying to tame that thing down to a 30-06? Lol. Your running 165s at about 2950. The same bullet/powder combo from the Imr page, the 165 spr spt with 75.5grns of H4831 calls for 77.5 at 3.340" in the speer manual and that's the bullet brand that's listed, shows 3087fps. Your out .160"s so you might actually be lucky if you get 2950. Good luck, but your way conservative.

 

[jpbaker]

OK thats what I wanted to know, I will start around 77gr and work it up...

TKS
JPB

 

[backwoods83]

The 300wm is a good choice to get good at reloading, its not very finicky, and is very universal powder wise as well, of course start lower with any cartridge but you usually do not have to many issues with pressure in the 300wm until you start loading 190+grn pills. Also as I have mentioned before, steer clear of hornady brass for the win mag, every time I have tried it, it has been really soft and warm loads distourt the primer pockets real easy.