Barnes Pioneer 45-70 Govt 300gr TSX – Powerful Copper Load

Description

Barnes Pioneer 45-70 Govt 300gr TSX puts a modern monolithic bullet into a cartridge that dates to 1873. The 45-70 Government has outlived every rifle it was designed for and remains in production because a large, heavy bullet at modest speed is still an extremely effective way to stop a large animal.

Copper in a Big Bore

The 45-70 has never had a penetration problem in the way smaller cartridges do. A .458 inch bullet at 300 grains or more carries enormous momentum, and traditional cast or jacketed soft points have taken bison, moose and brown bear for a century and a half.

What Barnes Pioneer 45-70 Govt 300gr TSX adds with its all copper flat nose bullet is consistency. A TSX retains essentially all its weight and opens into four petals rather than shedding a lead core, so you get a predictable wound channel and predictable penetration depth shot to shot. On a big animal at close range, predictability is worth a great deal.

At 300 grains this is on the lighter end for the cartridge, where 405 and 500 grain loads are also common. Copper is less dense than lead, so a 300 grain copper bullet is longer than a 300 grain lead one, and Barnes keeps the weight moderate to control overall length and pressure while still penetrating like something heavier.

Barnes Pioneer 45-70 Govt 300gr TSX Specifications

Barnes Pioneer 45-70 Govt 300gr TSX is a 300 grain 45-70 Government lever ammunition load using the Barnes TSX flat nose, 20 rounds to the box, from Barnes Bullets. The Pioneer line covers lever gun and revolver cartridges loaded with bullet profiles that rest safely in a tubular magazine.

Because the bullet is solid copper, Barnes Pioneer 45-70 Govt 300gr TSX is lead free heavy game ammunition, legal in California and across the growing list of federal refuges and state units requiring non-lead projectiles. The 45-70 is common in exactly the kind of guided bear and moose hunting where those rules increasingly apply.

The flat nose is required rather than chosen. In a tubular magazine each round rests against the primer of the one ahead, and a pointed bullet there is a real hazard under recoil. That is why every 45-70 lever load is flat nosed and why the cartridge never went to spitzer bullets despite its case capacity.

• Caliber: 45-70 Government
• Bullet weight: 300 grain
• Bullet type: Barnes TSX flat nose
• Construction: all copper
• Profile: safe for tubular magazines
• Lead free: yes
• Intended use: bear, moose, bison and large hogs
• Rounds per box: 20
• Manufacturer: Barnes Bullets
• Product line: Pioneer

Pressure Levels, Rifles and Recoil

The critical thing with any 45-70 ammunition is which pressure level it is loaded to, because the cartridge spans three distinct tiers. Trapdoor Springfield rifles are limited to very low pressure, lever guns such as the Marlin 1895 handle a middle tier, and modern single shots like the Ruger No. 1 tolerate the heaviest loads. Factory ammunition is generally loaded to the safe lever gun standard, but verify before firing anything through an antique rifle.

Recoil from Barnes Pioneer 45-70 Govt 300gr TSX is substantial and there is no way around it. A 300 grain bullet from a seven pound lever gun produces a solid shove, and heavier bullets are worse. Most people shoot ten or fifteen rounds in a session and call it enough, which is fine. Zero it, confirm it, and hunt with it.

Trajectory with Barnes Pioneer 45-70 Govt 300gr TSX is steep, and always has been. A 45-70 is a 150 yard cartridge in practical terms, and many people treat it as a hundred yard one. That is not a limitation so much as the cartridge’s identity. It exists to hit very hard at close range, and it does that better than almost anything.

Hunters who want Barnes Pioneer 45-70 Govt 300gr TSX for bear, moose, bison or large hogs with a 45-70 lever gun who want consistent deep penetration and lead free construction.

A Rossi R95 Trapper in 45-70 is a short, handy lever gun well suited to this load, and the Federal 300 grain subsonic is a very different tool for the same rifle if you shoot suppressed.

Store Barnes Pioneer 45-70 Govt 300gr TSX indoors and dry. Big straight wall cases hold a lot of powder, and powder is the component most affected by years of heat cycling, so a box that has lived in a truck through several summers is not the one to take on a bear hunt.