Weatherby Select Plus .338 Weatherby RPM ammunition (part no. H338225IL) loads a 225-grain InterLock for hunters who need controlled expansion without any surprises. Weatherby built its name on high-velocity magnum cartridges, and its factory ammunition is loaded to the same demanding standard as its rifles. An internal locking ring mechanically bonds the jacket to the core so the bullet mushrooms without separating, even after passing through bone. Brass-cased and 20 to a box, it is built to feed reliably through bolt guns and semi-autos chambered for the cartridge. In our rifle ammunition lineup, this .338 Weatherby RPM loading is a confirmed, dependable choice worth adding to the cart.

Key Specifications

• The chambering is .338 Weatherby RPM, a short-action .338 magnum built to deliver big-bore magnum performance from a compact case.
• The bullet weighs 225 grains, setting the balance of velocity and downrange energy this load is tuned for.
• The bullet is a InterLock, the projectile Weatherby chose to load behind .338 Weatherby RPM.
• An internal locking ring mechanically bonds the jacket to the core so the bullet mushrooms without separating, even after passing through bone.
• Cases are Brass, holding pressure reliably and staying reloadable for handloaders.
• Each box holds 20 rounds, enough to confirm zero and still have rounds on hand.
• A case ships 10 boxes (200 rounds total), ideal for stocking up or buying once for the season.
• At about $3.53 per round, the price reflects the bullet construction loaded into this round.
• The box ships at about 1.61 lb, handy for estimating freight on a bulk order.

Frequently Asked Questions

What game is the 225-gr InterLock suited for? With .338 Weatherby RPM behind a InterLock bullet, it is built for deer-class game and similarly sized animals within the cartridge’s normal hunting range.

How many rounds come in a case? A case ships 10 boxes of 20, 200 rounds total.

How is the InterLock different from a standard cup-and-core bullet? Bullet construction, not just weight or velocity, is what decides how a cartridge actually performs on impact.

Buy the Weatherby Select Plus .338 Weatherby RPM 225 gr InterLock

A load you can trust round after round is worth more than a marginal ballistic edge, and this .338 Weatherby RPM loading delivers exactly that. Pick up a case and put it through its paces before you need it. Order from our Lubbock, Texas gun shop and it ships fast to your door.