300 WSM with Sierra 165gr HPBT

[bteate]

First of all, hello to everyone since I'm new here.

Now to the question. I don't have a load manual for Sierra, so if anyone could help with load data for that combo I'd appreciate it. I have the following powders:

IMR- 4831, 4350
Hodgdon- H414, BLC-2, H4831SC
Reloader- 22, 19, 15
Varget

I have all primers except Fed Mag.

This is for an A-Bolt so I'm restricted to SAAMI COAL due to magazine. Any pet loads would be greatly appreciated. Thanks in advance.

 

[Deleted member 46119]

I'm getting such good results with Reloader-17 but you don't have it.

For ball powders as mentioned here before, use magnum primers.

For stick/extreme use regular rifle primers.

I tried many of your possible combos but not all.

My choice of order is:
IMR4350 fills the case and worked OK
H414 have not done any work with it but have it.
Varget kinda can't go wrong.
IMR4831 hard to get enough powder in there but it will work.

 

[Shortmagman]

The Sierra manual gives the following for a few of the powders that you have listed.

Firearm Used: Win Model 70
Barrel Length 24 "
Cases: win
Primer: WLRM

RL 19 Start Load 61.7 grains Max load 70.1
RL 22 Start 63.0 Max 7l.0
IMR-4831 61.7 68.7
H4831SC 63.l 70.9

They show that you can get the highest velocity of 3100 ft/sec with both RL-19 and RL-22. The others are 50-100 ft/sec slower.


I have shot a great deal of RL-19 in my 300WSM. My Model 70 loves RL-19 with both 155 and 165 grain HPBT. I never pushed the load because I was looking for accuracy, so I settled on 67-69 grains of RL-19 in Norma cases and WLRM primers.

My second choice is IRM-4831. This powder produced good accuracy and velocity in my 300WSM's.

 

[bteate]

jfseaman, are you having any temp sensitive issues with RL17?

 

[bteate]

The Sierra manual gives the following for a few of the powders that you have listed.

Firearm Used: Win Model 70
Barrel Length 24 "
Cases: win
Primer: WLRM

RL 19 Start Load 61.7 grains Max load 70.1
RL 22 Start 63.0 Max 7l.0
IMR-4831 61.7 68.7
H4831SC 63.l 70.9

They show that you can get the highest velocity of 3100 ft/sec with both RL-19 and RL-22. The others are 50-100 ft/sec slower.


I have shot a great deal of RL-19 in my 300WSM. My Model 70 loves RL-19 with both 155 and 165 grain HPBT. I never pushed the load because I was looking for accuracy, so I settled on 67-69 grains of RL-19 in Norma cases and WLRM primers.

My second choice is IRM-4831. This powder produced good accuracy and velocity in my 300WSM's.

I've had good results with my Savage 300WSM with 180gr Acubonds using IMR 4831 also. Averages .5 moa @2980 fps. The Savage has blind mag well so seating depth is not an issue.

 

[Deleted member 46119]

jfseaman, are you having any temp sensitive issues with RL17?

California...

so no