Comparison of Winchester-Western and PPU head stamp rifle brass in 22-250 Remington. PPU is made by Prvi Partizan, a Serbian ammunition company that has been operating since 1928. Duck Creek Sporting Goods (www.duckcreeksportinggoods.com) sales the PPU at .44 cents a round; the Winchester 22-250 Remington is .479 cents each in 100 case bags (click here). My test rifle is a Ruger American Predator fitted with a Zeiss Terra 4-12X scope. Nosler 55 grain Spitzer Boat-Tail bullets, 34.0 grains of Varget powder and Federal 210 primers. Cartridge overall length is 2.35 inches. Both the PPU and Winchester is factory new casings neck sized prior to loading. The firings took place a week apart.
PPU brass specs: Case length is a consistent 1.905 inches, average weight is 156.5 grains, with a spread from lightest to heaviest a 2.4 grains. Half of the ten sampled had exactly the same weight, overall very consistent product. Primer pockets are very tight, my comparison was the amount of pressure required to seat the primers using the RCBS Hand Priming Tool. Considerable more force was required to seat primers in the PPU brass when compared to Winchester-Western. (I understand that this is my opinion, not sure of a scientific way to measure). When prepping the brass for the second loading I noticed seating the primers still required some effort. Chronograph results reflect an average velocity of 3,291.7 fps (spread of 65 fps). Best group at 100 yards is .475 inches. (Test date March 25,2018).
Winchester brass specs: Again I selected ten pieces at random and discovered that case length varies from 1.902 to 1.910 inches, average weight is 157.9 grains, with a spread from lightest to heaviest a 3.4 grains (there was only two brass cases sharing identical weights). Average velocity recorded is 3,424.7 fps with a spread of 62 fps. Best group at 100 yards is .751 inches (discounting one flier), which seems to be what I normally do with this rifle. I have worked up loads using Hornady 52 grain Match HPBT and 55 grain Spitzer with similar results. The HPBT provided better results when loaded to 38.0 grains H-380. (Test date March 31, 2018).
What I found was interesting was the velocity was 133 fps greater using Winchester rifle brass and point of impact is ½ higher and ½ left at 100 yards. Flatter trajectory is not a surprise, it is a product of velocity. The under ½ group using PPU 22-250 Remington brass is best I have shot with that Ruger rifle, I shot three similar 5 shot groups that day at the range. I was surprised I could not duplicate the results on test number two, the only variable in components is the rifle casings. After verifying the velocity readings I put the chronograph away so I can concentrate on the target instead of trying not to shoot my instrument off the tripod – I hear that is not a condition covered under warranty.