.308 with H414 magnum primers?

hartcreek · July 6, 2014, 05:04 PM

I am loading a bunch of .308s and I have used up my 3031 and 4064. I have a line on some H414 BUT my manual sates that I should use Magnum Primers for H414 in .308s. I already have cases primed as I had hundreds to get done and I had plenty of LRPs and the 3031 and 4064 do not require Magnum LRPs so I am wondering.......

Anyone load .308 with H414 and use LRPs.

I have used H414 for 25-35 and .32 Winchester Specials but those do not require Magnum LRPs

243winxb · July 6, 2014, 06:12 PM

Spherical Powders need magunum primers.

LOLBELL · July 6, 2014, 09:14 PM

I use H414 in a 22-250 with standard primers and no issues

243winxb · July 6, 2014, 10:05 PM

Good reading from Unclenicks link.

Quote:

We tested loads at both maximum normal pressures and at the starting loads (some labs calculate start loads—we shot them). Standard primers caused no ignition issues at the max load but posted higher extreme variations in pressure and velocity in the lower pressure regimes of the start loads. In extreme cases, the start loads produced short delayed firings—probably in the range of 20 to 40 milliseconds but detectible to an experienced ballistician. Switching that propellant to a Magnum primer smoothed out the performance across the useful range of charge weights and completely eliminated the delays.

Read more: http://www.shootingtimes.com/2011/01...#ixzz36kTDpUcn

hartcreek · July 6, 2014, 10:31 PM

243 That could be the answer as I did more digging in my loading manuals and I found weights up to 46 grains of H414 still using LRPs. I will need 52 grains for .308......maybe I can find some differnt powder tomorrow.

hartcreek · July 8, 2014, 04:35 AM

Thanks guys for all your help. I made come calls and chased down a rural gunshop that had powder. I could have cleaned out everything they had and they could get what ever was wanted and have a source for powder.

I wound up buying two screws to get a .308 Mossberg dialed in and three pounds of H414 and one pound of 4350 so I could finish up the primed cases. Once back in town I picked up 500 magnum LRPs so I can use the H414 in .308 and 30-06.

The surprising thing is the powder costs were the same as in town but the primers were a buck more a tray so I passed and bought my primers at Bimart.

I now have 380 .308 loaded using three different powders with bullets that are jacketed and hardcast and close bc that will give me a muzzle velocity of 2500- 2600fps. For a bolt action hunting rifle that is enough.

When I first switched to Dot powders for pistols I encountered that step fireing because of the dual base nature of the loading powder that used nitroglycerine and nitrocelulose. I could actually feel the two accelerations when I shot.

July 6, 2014, 05:04 PM	#1
hartcreek Junior member Join Date: April 22, 2014 Location: Washington Posts: 1,549	.308 with H414 magnum primers? I am loading a bunch of .308s and I have used up my 3031 and 4064. I have a line on some H414 BUT my manual sates that I should use Magnum Primers for H414 in .308s. I already have cases primed as I had hundreds to get done and I had plenty of LRPs and the 3031 and 4064 do not require Magnum LRPs so I am wondering....... Anyone load .308 with H414 and use LRPs. I have used H414 for 25-35 and .32 Winchester Specials but those do not require Magnum LRPs Last edited by hartcreek; July 6, 2014 at 05:05 PM. Reason: cuz

July 6, 2014, 09:14 PM	#3
LOLBELL Senior Member Join Date: March 4, 2010 Location: Fayette AL Posts: 226	I use H414 in a 22-250 with standard primers and no issues __________________ Don't squat with your spurs on!!

July 6, 2014, 10:31 PM	#5
hartcreek Junior member Join Date: April 22, 2014 Location: Washington Posts: 1,549	Hmmm 243 That could be the answer as I did more digging in my loading manuals and I found weights up to 46 grains of H414 still using LRPs. I will need 52 grains for .308......maybe I can find some differnt powder tomorrow.

July 8, 2014, 04:35 AM	#6
hartcreek Junior member Join Date: April 22, 2014 Location: Washington Posts: 1,549	Got it handled Thanks guys for all your help. I made come calls and chased down a rural gunshop that had powder. I could have cleaned out everything they had and they could get what ever was wanted and have a source for powder. I wound up buying two screws to get a .308 Mossberg dialed in and three pounds of H414 and one pound of 4350 so I could finish up the primed cases. Once back in town I picked up 500 magnum LRPs so I can use the H414 in .308 and 30-06. The surprising thing is the powder costs were the same as in town but the primers were a buck more a tray so I passed and bought my primers at Bimart. I now have 380 .308 loaded using three different powders with bullets that are jacketed and hardcast and close bc that will give me a muzzle velocity of 2500- 2600fps. For a bolt action hunting rifle that is enough. When I first switched to Dot powders for pistols I encountered that step fireing because of the dual base nature of the loading powder that used nitroglycerine and nitrocelulose. I could actually feel the two accelerations when I shot.

July 6, 2014, 06:12 PM	#2
243winxb Senior Member Join Date: July 26, 2011 Location: USA Posts: 1,730	Spherical Powders need magunum primers.