Description

Buffalo Bore Supercharged .35 Whelen 225gr Sierra SPTZ-BT — 240 Rounds

The Buffalo Bore 35 Whelen Supercharged is the maximum-performance hunting load in the .35 Whelen category.

A 225-grain Sierra SPTZ-BT at 2,705 fps and 3,655 ft-lbs from a 24-inch barrel, loaded to the highest safe pressure specification for rifles in normal operating condition.

At $2.50 per round for 240 rounds, this is the premium tier — 30% more per round than the Federal Fusion 200gr, delivering 25 more grains at 105 fps more velocity.

Supercharged — What It Means

Buffalo Bore’s “Supercharged” designation indicates loads pushed to the maximum safe pressure ceiling for the cartridge.

This produces higher velocity than conventional factory loads — at the cost of requiring a rifle in normal operating condition.

The Buffalo Bore 35 Whelen Item 42A runs the 225-grain Sierra SPTZ-BT at 2,705 fps.

Buffalo Bore’s Item 42B uses the same weight Barnes TSX at 2,654 fps — covered in Tim Sundles’ comparison notes in the original description above.

Tim Sundles on 42A vs 42B — Load Selection for Game

Tim Sundles specifies: the Sierra SPTZ-BT (this load) expands reliably on broadside shots from whitetail deer through Yukon moose and bison.

For angled shots — quartering or going away — he recommends 42B (the Barnes TSX) for maximum penetration depth.

The Buffalo Bore 35 Whelen 42A is the versatile general hunting load; 42B is the specialist tool for difficult shot angles on the largest game.

3,655 ft-lbs — The .35 Whelen at Full Potential

At 225 grains and 2,705 fps, the Buffalo Bore 35 Whelen produces 3,655 ft-lbs — 653 ft-lbs more than the Federal Fusion 200gr at 3,002 ft-lbs.

This represents the .35 Whelen operating near its ballistic ceiling.

Buffalo Bore confirms sub-MOA accuracy from their test Remington 700 with a 24-inch barrel.

Specifications

• Caliber: .35 Whelen (also referred to as .358 Whelen)
• Bullet: 225 grain, Sierra Spitzer Boat-Tail (SPTZ-BT)
• Muzzle velocity: 2,705 fps (24″ barrel)
• Muzzle energy: 3,655 ft-lbs
• Application: Whitetail deer through Yukon moose, bison — broadside shots
• Lead free: No
• Cartridge case: Brass, reloadable
• Primer: Boxer, non-corrosive
• Buffalo Bore Item: 42A (225gr Sierra SPTZ-BT)
• Quantity: 240 rounds (12 × 20-round boxes)

Browse the .35 Whelen ammunition category. Specifications are published by SAAMI and by Buffalo Bore Ammunition directly. Safe storage guidance is available from the NSSF.

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SHORT DESCRIPTION (above Add to Cart)

Buffalo Bore Supercharged .35 Whelen. 225-grain Sierra SPTZ-BT, 2,705 fps, 3,655 ft-lbs (24″ barrel). Loaded to maximum safe pressure — highest velocity available in .35 Whelen factory ammunition. Specified for whitetail deer through Yukon moose and bison on broadside shots. For angled shots on large game, see Item 42B (Barnes TSX). Brass, reloadable, Boxer primer. Buffalo Bore Item 42A. 240 rounds (12 × 20-round boxes) at $2.50/round.

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💬 Before You Go — Hunting With Buffalo Bore Supercharged .35 Whelen?

Running Item 42A on elk, moose, or bison? Leave a review with barrel length, game, distance, and shot angle. Real field data from hunters using Buffalo Bore 42A is exactly what the next buyer needs to choose between 42A and 42B for their specific hunting scenario. And if you came looking for a .35 Whelen load we don’t carry, tell us. 🎯

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Please purchase and use ammunition responsibly and in accordance with all federal, state and local laws. Ammunition cannot be shipped to all jurisdictions — verify legal shipment to your address before ordering. Buyers must be of legal age in their jurisdiction. Not for sale to prohibited persons. Verify state and local hunting regulations before field use. This ammunition is rated for use in rifles in normal operating condition — inspect your rifle before use.

Frequently Asked Questions

What is Buffalo Bore “Supercharged” and is it safe in my rifle? Buffalo Bore loads Supercharged ammunition to the maximum safe pressure for the cartridge, higher than standard factory loads. This is considered safe for any .35 Whelen chambered rifle in normal operating condition. Buffalo Bore explicitly notes this caveat — rifles with cracks, excessive wear, or other mechanical issues should not be used with Supercharged loads. If your rifle is in normal operating condition, this ammunition is safe to use.

What is the difference between Item 42A (this) and Item 42B (Barnes TSX)? Tim Sundles explains it directly: 42A (this Sierra SPTZ-BT) expands readily on expected impact velocities and holds together on large game for broadside shots on anything from whitetail to Yukon moose and bison. 42B (Barnes TSX, 2,654 fps) is specifically for angled shots — quartering or going away — where deeper penetration through bone mass is required. The TSX’s all-copper construction and controlled expansion deliver greater penetration depth than the Sierra SPTZ-BT on difficult angles.

Why is 42A faster than 42B at the same bullet weight? The Barnes TSX is an all-copper bullet — the same weight in copper is longer than a lead-core bullet of the same weight. The longer TSX occupies more powder column space in the case, reducing powder capacity and resulting in 51 fps less velocity than the shorter Sierra lead-core bullet.

Is 2,705 fps verified from a specific barrel? Yes — Buffalo Bore tested this from a Remington 700 with a 24-inch barrel. Actual velocity will vary with barrel length; shorter barrels produce less velocity.

How does this compare to the Federal Fusion 200gr in this category? Federal Fusion: 200gr, 2,600 fps, 3,002 ft-lbs, $1.92/round. Buffalo Bore 42A: 225gr, 2,705 fps, 3,655 ft-lbs, $2.50/round. Buffalo Bore is 25gr heavier, 105 fps faster, 653 ft-lbs more energy, and $0.58/round more expensive. The Buffalo Bore is the maximum-performance option; the Federal Fusion is the standard bonded option.

Is the brass reloadable? Yes — Boxer-primed brass.

How many rounds is 240? 12 × 20-round boxes.

What’s the per-round cost? $600 / 240 = $2.50 per round.