Nosler Partition-Copper 30-Caliber 300-Grain 50-Rounds Spitzer
Every Partition bullet in the Nosler line is engineered with an optimum length, weight and ogive design for maximum in-flight and terminal performance. The fully tapered copper-alloy jacket ruptures instantly at the thin mouth, yet the gradual thickening along the bullet’s axis controls expansion and curls the jacket uniformly outward at high and low velocities. Nosler’s integral partition supports the expanded mushroom and retains the rear lead alloy core. Enclosed rear core retains more than half the original bullet weight for deep penetration. Special crimp locks add strength to resist deformation under the pressure of heavy magnums.
Bullet Tip Material: Lead
Application: Medium-Large Game
Bullet Caliber: 375 Caliber
Bullet Diameter: .375
Bullet Type: Spitzer
Core Material: Lead
Jacket Material: Copper
Sectional Density: .305
Weight: 300 gr. Nosler Partition-Copper 30-Caliber 300-Grain 50-Rounds Spitzer
Winchester primers come in WSP, WLP, WSR, and WLR flavors – small pistol, large pistol, small rifle and large rifle. They use the same primer for standard and magnum loads, which in essence means they are all magnum primers, and they act that way on a chronograph, with larger standard deviation in velocity than I get with a standard primer from CCI.
My preference in primers for standard loads is CCI, and generally speaking in a good load I can get standard deviations in velocity in the high single digits or low teens, where the same load may have and SD of 25-30 with a Winchester primer.
I’ve had good luck using CCI primers. From what I understand CCI benchrest primers are usually easier to ignite than their regular, magnum and military style primers. And the military and magnum primers need a harder strike to ignite.
I had my best groups at 100 yards using CCI BR primers in my AR-15 in 5.56. However, I don’t recommend using them in an AR because they would be the ones most likely to slam fire.
Never had a misfire or slam fire with either the CCI #41 or BR in the AR. Remington Small Rifle Bench Primers #7-1/2 Box of 1000