10mm Auto – 180gr FMJ – Blazer Brass (5221) – 1000 Rounds

The 10mm Auto has become one of the most popular big-bore pistol cartridges for hunters, hikers, and enthusiasts, and Blazer Brass 5221 is one of the most affordable ways to practice with it. This listing is CCI Blazer Brass 10mm Auto 180 grain full metal jacket ammo, MPN 5221, sold as a 1,000 round case.

CCI rates this load at 1,200 fps with 575 ft-lbs of muzzle energy. That is a genuine 10mm load, well above typical 40 S&W performance, so it gives you realistic recoil for training with a full-power carry or woods load. Many budget 10mm practice loads are loaded down to near 40 S&W levels; Blazer Brass 5221 is not. The 180 grain FMJ bullet feeds reliably in modern 10mm pistols. A full metal jacket bullet does not expand, so this ammunition is for practice and familiarization rather than hunting or defense.

This ammunition fits pistols and carbines chambered in 10mm Auto, including the Glock 20, 29, and 40, Springfield XD-M Elite and 1911 TRP in 10mm, Sig P320 XTEN, Smith and Wesson M&P 2.0 10mm, Ruger GP100 and SR1911 in 10mm, Colt Delta Elite, EAA Witness, and carbines such as the Kriss Vector and Hi-Point 1095TS. A common question is whether 10mm can be fired in a 40 S&W pistol. No. The 10mm case is longer and will not safely chamber in a 40 S&W gun. Another common question is whether a 10mm pistol can fire 40 S&W. Some can with a dedicated conversion barrel, but do not do it without one.

Blazer Brass 5221 is new production ammunition, not reloads, made in the USA by CCI in Lewiston, Idaho. Each round uses a reloadable brass case with a boxer primer and is non-corrosive, and 10mm brass is valued by handloaders. This case comes in factory packaging as 20 boxes of 50 rounds for a total of 1,000 rounds of 10mm 180 grain FMJ. Buying by the case keeps you on one production lot for consistent function.