The Barnes TSX 7.62x39mm .310 123gr Boat Tail Bullet (brand part no. 30391) is an all-copper hunting bullet from Barnes, sized at .310 inch for 7.62x39mm reloaders. The 123-grain boat tail is built on the TSX design that Barnes describes as combining accuracy, reduced barrel fouling and increased velocity. It carries a G1 ballistic coefficient of .275 and a sectional density of .183 to plug into your load data. Each box carries 50 bullets, enough for load development and a season of loading.

Key Specifications

• Caliber is 7.62x39mm, the designation to match to your cartridge before you load.
• Bullet diameter is .310 inch per the maker, the figure to check against your barrel and seating die.
• Bullet weight is 123 grains, which sets the starting point for your powder charge and load development.
• The profile is a boat tail, a tapered base that trims drag at long range.
• Construction is all-copper in the TSX line, which the maker credits with accuracy, reduced barrel fouling and higher velocity.
• The maker classes it for hunting, with big game as the listed pursuit.
• Each box holds 50 bullets, so one box covers load development before you commit to a larger supply.
• The G1 ballistic coefficient is .275, the figure to enter in a ballistic solver when planning drop and wind drift.
• Sectional density is .183, a weight-to-diameter measure that relates to how deeply the bullet can penetrate.
• Overall bullet length is 0.985 inch, the dimension that drives seating depth and magazine fit.

Frequently Asked Questions

What diameter is this TSX bullet? It measures .310 inch and is labeled by Barnes for 7.62x39mm, so it is not the same as a .308-inch .30 caliber bullet.

Is this a boat tail or a flat base bullet? Barnes lists it as a boat tail, with the base tapered to reduce drag.

What is the TSX bullet made of? Barnes builds the TSX from all-copper, and lists big game as the pursuit for this 123-grain bullet.

Buy the Barnes TSX 7.62x39mm .310 123gr Boat Tail Bullets, 50-Count

Reloaders working up a 7.62x39mm hunting load can order this 50-count box from our Lubbock, Texas gun shop for fast, insured shipping. Add it to your bench alongside the rest of our reloading bullets.