300 ultra primers?

[outdooraddict]

What primers are you using for the 300 ultra I see some say federal 215, some are remington 9 1/2 and some remington 9 1/2m just wondering as I am just starting to reload myself I will be using retumbo, imr4350, and reloader 22 for powders and Im going to play with berger 210vld, 200gr accubonds, and 200gr barnes tsx to start any help is much appreciated I am working on a elk load and also would like to play with a light load to target practice with and not knock my shoulder off.

 

[Iron Worker]

Two red flags

I've loaded for 300 RUM . Shot a Bear with that bad boy MAGNUM PRIMERS ONLY
Those heavy bullets don't go near any 4350. Reloader22 would be the fastest powder I'd use. Retumbo was the powder that worked the best for my self. 95grs of Retumbo with Rem Magnum 9 1/2 primer 200 gr Accubond produced 3,200 FPS and a dead Bear. So H1000, Re 25, Retumbo, Hodgen 869.

 

[300rum]

The best group for my 300 ultra was with:
200AB
Retumbo 91gr
Rem 9 1/5M primer
Remington cases

Chris

 

[Iron Worker]

Every gun is different

The poster before me by "300 RUM" used exact same components as my self but his load was my starting load. His load could've produced same muzzle velocity as mine ? Who knows why?

 

[stxhunter]

i use federal gm 215 primers and 95.5 gr retumbo

 

[cinch]

I use 95 grains Retumbo with a CCI250 and 200 grain Accubond. It is running 3265 out of a 27" Lilja APS Remington 700.

 

[jeff 300]

i use federal gm 215 primers and 95.5 gr retumbo

same here

 

[300rum]

The poster before me by "300 RUM" used exact same components as my self but his load was my starting load. His load could've produced same muzzle velocity as mine ? Who knows why?

I just got on the sporter barell 3050fps, with 0.5moa/100yards.
I got also very good grup 0.375 moa at 95gr Retumbo, but with hard extractor movement. So I stepped down to 91gr to be safer.

Now, I just rebarelled the rifle to a 338EDGE, and i'm in bullet development stage.
I tried US869 without good results, and now i'm using H-1000 with 92gr for 300SMK. The group is tighter, but I have to play with bullet deep seating. to tune the load.