good load for 300WSM

kevschm

kevschm

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Hello

bullet - hornady interlock 165gr sp
powder - winchester 760
primers - CCI

what a good combo for these components

Thanks for the help

I know I can look in a book, but there is people that know this stuff better than a book.

Thanks for the help
 
I have had good luck accuracy wise with 62.5 gr of H380, arround moa for 3 shots.

The first 5 round that went through the gun shot 1.25 moa wih 60.0 gr, of H380.

But H-4350 and H 4831 SC works well to , I just spent a bit more time fooling with H380, because I had 3 pounds of it and no other cartridge that liked it at that time,,,there is no doubt the other 2 mentioned had equal potential on targets, and velocity and maybe even better and more stable in hot or cold weather.
 
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kevschm said:
what a good combo for these components
Click to expand...

No two firearms are the same so there is no such thing as a "good" load that will do well in all rifles.


A few hints to start you off:

Use a CCI 250 - or other large rifle magnum primers - especially with heavy loads of ball powder like W760.

Start at 61 grains of W760 and work up in half-grain increments to a maximum of 65 grains watching for signs of excess pressure along the way.


(READ A GOOD RELOADING MANUAL -AND UNDERSTAND COMPLETELY WHAT YOU ARE READING - BEFORE LOADING YOUR FIRST CARTRIDGE!)
 
Works for me

From my range reports:
Speer 165 Flat base (#2035).
WLRM primer
Win. case.
64gr W760 powder.
Avg. 3080fps
3 shot group 0.78"

I've found W760 and H414 to be very good with a number of 300wsm loads. Check in your load manuals, or the Hodgdon web site to verify my load, and work from the minimum on up. I have NEVER gone over the max book load as far as I recall, but be safe and double check.
I don't make notes of how many groups I have shot with any of my loads, so the 0.78" group was just the average of a # of groups on one day that I recorded the load. I also don't fudge my #'s to impress anyone since I NEED to know each load as I do hunt with them. If the future shows that any load will not consistanly keep near 1" , 1-1/4" I will note that in my records and not go back to it.
 
with 168 SMK's I used 57 gr. H4895- Fed Match mag primers..... max load is 57.5 gr ...if you try this load start low and work your way up... I have also used 68 gr's of R19 x 175 gr SMK's with very good results... max is 70.5 grs
 
I have a Weatherby Vanguard [Howa] in 300 WSM It really liked 65 grains of W760 behind the 165 grain Interlock. It also shot very well indeed with the same load and the 165 Speer Grand Slam. [work up from 3 grains below, carefully] I did not try the 165 Partition, because I have a 180 Partition load that shoot so very well, I will just leave it alone, thanks. Regards, Eagleye
 
Just did this for a buddy's Browning SS with the 165 SST. Tossup between 68.5 grs W760 and 69.5 grs RL-19 both with CCI 200 (standard LR) primers. Both seemed to be in the 3150 fps (at +6 deg C) range and spooky accurate. Light trigger helped keep both of these 2 loads considerably better than MOA but if it were me I`d have chosen the RL-19 between the 2 just because I like it and I managed an honest .65 inch 3-group - not my rifle but I cleaned it. Both were seated to 2.835 (COL) inches as a starting point as per book, but it worked so well we saw no reason to mess with it.
 
I use W760 with 165 sst's and get better groups compared to using H-4895 or Varget as a powder. I believe this has something to with the burn rates between the two powders and filling up case capacity. Large rifle primers seem to work fine for the cartridge. I load 64.5g. But as always: check the books,start low and safely work the load up.
 
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