Lr or lrm primer for 300wsm?

[the big greasy]

I know the book calls for magnum large rifle primers, but up here in canada there are none around. Is it dangerous to use large rifle primers in a 300wsm, h3450 pushing a 180 tsx. Will be hunting in - 30s this winter. Thank you.

 

[Roughrice]

Not at all.
I used non-magnum primers in my 300 WM with H4350 without issue and shot great.
Also use them in 7 SAUM.

 

[Rick Richard]

I have never tried it, but I know some folks who have used regular or non mag primers. The only slight risk you have is it not setting off the charge, but that is a very low risk.

 

[the big greasy]

Not at all.
I used non-magnum primers in my 300 WM with H4350 without issue and shot great.
Also use them in 7 SAUM.

Did you feel like it was burning all the powder in the case?, an you still got good velocity?

 

[Roughrice]

Yep.
Good clean burn with 180 Partitions running around 2950. Accurate and consistent from 90 degree southern sea level temps to 14 degrees @ 9000 ft.

 

[Roughrice]

Sorry! Corrected my post!
It was 180 Partitions.

 

[Hand Skills]

I know the book calls for magnum large rifle primers, but up here in canada there are none around. Is it dangerous to use large rifle primers in a 300wsm, h3450 pushing a 180 tsx. Will be hunting in - 30s this winter. Thank you.

Never had an issue with Large Rifle Primers in WSMs. Sometimes I can get better velocities with the LR than I can with Magnum.

Grain for grain, Magnum primers offer better velocity, but I've noticed sometimes they pressure out earlier in the WSMs.

 

[Wolf76]

My 300wsm shot better with LR primer, regardless of load.

 

[Barrelnut]

My 300wsm shot better with LR primer, regardless of load.

Same here. Lots of 300wsm shooters use LR primers. I think they work better with the H4350 burn rate.

 

[brentc]

I use LRs (Fed 210M) in both 300 WM and 300 WSM. They performed the best in my primer test during load development

 

[skipglo]

I know the book calls for magnum large rifle primers, but up here in canada there are none around. Is it dangerous to use large rifle primers in a 300wsm, h3450 pushing a 180 tsx. Will be hunting in - 30s this winter. Thank you.

Whereabouts in Canada is Grease County? And rule of Thumb in reloading...when it says magnum Try to use a magnum primer
Rule 2...rule 1 isn't really important until you are loading 80 GRAINS OR MORE POWDER!

 

[the big greasy]

Whereabouts in Canada is Grease County? And rule of Thumb in reloading...when it says magnum Try to use a magnum primer
Rule 2...rule 1 isn't really important until you are loading 80 GRAINS OR MORE POWDER!

Central alberta. I nicked named my home that.

 

[the big greasy]

Whereabouts in Canada is Grease County? And rule of Thumb in reloading...when it says magnum Try to use a magnum primer
Rule 2...rule 1 isn't really important until you are loading 80 GRAINS OR MORE POWDER!

Central alberta. I nicked named my home that.

 

[asd9055]

I have one load for 300WBY 180 TSX and IMR7828 with CCI200 and one load 300WBY 180 Nosler BT, IMR4350 and Remington 9 1/2 Large Rifle (Non magnum). I have never hunted at your temperatures though.