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azredhawk44 · February 17, 2006, 02:27 PM

I have heard that Winchester primers are formulated to burn ball powder most efficiently, while CCI primers are formulated to burn extruded powder best.

Don't know if that is true or not, but H4895 is extruded. H335 is ball. The explanation I got is that ball powders require a hotter ignition to start them off properly.

H4895 fills the case very well. Should be very unlikely that you will get non-uniform ignition since the powder will always be backed right up to the flash hole. H335 leaves a lot more case volume open.

I've done loading for these, but haven't been to the range to try them out yet. I'll post a related thread later this weekend after getting to shoot.

Bullets I chose:
Hornady Interlock SpirePoint
Remington CoreLokt Pointed SoftPoint
Nosler Ballistic Tip Spitzer
Combined Technologies Partition Gold Moly Spitzer
(all 150gr)

Next order from Midway will get me heavier bullets if this test checks out fine. I'm a novice at loading for 308 with an M1A, so I am very leary of slamfires or overpressure in the gas system. I hear the magic number to fear for bullet weight is 180, but that shouldn't apply to you since you're using a bolt action. Next bullets for me to test will be the Nosler match 155gr, the Hornady match 168gr Moly coat hollowpoint boat tail, Hornady match 168gr hollowpoint boat tail jacketed, Hornady interlock 165gr and Remington Corelokt 165gr. Let me know if you are interested in results from any of those in particular.

The 3 powders I have on hand are H335, H4895 and Reloader15. I just got 200 CCI primers to play with this last week, so my next batch of loads will be with a primer supposedly designed for extruded powders.

February 17, 2006, 02:27 PM	#3
azredhawk44 Junior member Join Date: September 28, 2005 Location: Mesa, AZ Posts: 6,465	I have heard that Winchester primers are formulated to burn ball powder most efficiently, while CCI primers are formulated to burn extruded powder best. Don't know if that is true or not, but H4895 is extruded. H335 is ball. The explanation I got is that ball powders require a hotter ignition to start them off properly. H4895 fills the case very well. Should be very unlikely that you will get non-uniform ignition since the powder will always be backed right up to the flash hole. H335 leaves a lot more case volume open. I've done loading for these, but haven't been to the range to try them out yet. I'll post a related thread later this weekend after getting to shoot. Bullets I chose: Hornady Interlock SpirePoint Remington CoreLokt Pointed SoftPoint Nosler Ballistic Tip Spitzer Combined Technologies Partition Gold Moly Spitzer (all 150gr) Next order from Midway will get me heavier bullets if this test checks out fine. I'm a novice at loading for 308 with an M1A, so I am very leary of slamfires or overpressure in the gas system. I hear the magic number to fear for bullet weight is 180, but that shouldn't apply to you since you're using a bolt action. Next bullets for me to test will be the Nosler match 155gr, the Hornady match 168gr Moly coat hollowpoint boat tail, Hornady match 168gr hollowpoint boat tail jacketed, Hornady interlock 165gr and Remington Corelokt 165gr. Let me know if you are interested in results from any of those in particular. The 3 powders I have on hand are H335, H4895 and Reloader15. I just got 200 CCI primers to play with this last week, so my next batch of loads will be with a primer supposedly designed for extruded powders.