Product information: .40cal 10mm 155gr RNF .401″ 

.40cal 10mm 155gr RNF .401″ In Stock. This bullet is swaged from a certified 6/2 lead alloy then moly coated to completely encase the lead core. This protects the bullet from damage and is a natural lubricant. It keeps the bullet at tight factory dimensions and goes through the bore intact.Safe for indoor ranges.

Key Specifications:

• Bullet Diameter: 0.401 inches
• Bullet Weight: 155 grains
• Bullet Type: Round Nose Flat (RNF)

The 0.401″ bullet diameter is the standard for the 10mm Auto cartridge, ensuring proper fit and reliable cycling in handguns and carbines chambered for this high-performance centerfire pistol round.

At 155 grains, this bullet weight falls on the lighter end of the spectrum for 10mm Auto ammunition. Some key points:

• The 155gr RNF bullet typically produces muzzle velocities around 1,150-1,250 fps from a standard 4-5″ barrel.
• This medium-weight bullet offers a good balance of velocity, penetration, and recoil management.
• 155gr RNF 10mm Auto ammunition is popular for target shooting, self-defense, and hunting of medium-sized game.

The Round Nose Flat (RNF) bullet design provides:

• A rounded, non-hollowpoint nose shape that maintains good penetration while avoiding excessive expansion.
• The RNF profile is reliable and consistent, offering predictable terminal ballistics.
• RNF bullets feed and function well in 10mm Auto firearms, providing dependable cycling.

This .40 caliber 155 grain Round Nose Flat (RNF) bullet with a .401″ diameter represents a capable and versatile choice for 10mm Auto shooters.

The 155gr weight combined with the RNF bullet shape makes this ammunition well-suited for target shooting, personal defense, and hunting of medium-sized game, offering a good mix of velocity, penetration, and recoil management.

Compared to heavier 10mm Auto bullet weights, the 155gr RNF provides slightly reduced recoil while still maintaining excellent terminal performance, making it a popular compromise for many shooters.

The .40 caliber 155 grain Round Nose Flat (RNF) bullet with a .401″ diameter is a capable and versatile option for the 10mm Auto cartridge, offering reliable expansion and penetration for a variety of applications.