Winchester Model 70 Scope Bases & Rails

Mounting a scope on a Model 70 is easy once the base actually matches your rifle. The annoying part is that “Winchester Model 70” isn’t just one pattern—there are different action lengths, different eras, and a couple of common hole-spacing variations that can turn “should fit” into “doesn’t line up.”

This page is built to make that decision simple, so you can pick a base that bolts up clean, holds zero, and gives you the ring placement you want.

---

Start here: how to choose the right base

1) Match your action length

Most fitment issues happen because a short action base gets ordered for a long action (or the other way around). If you already know your action length, that’s your fastest filter.

• Short Action: typically used for shorter cartridges and shorter receiver footprints

• Long Action: longer receiver footprint, different hole spacing

If you’re unsure, check your rifle’s specs, manual, or confirm the receiver pattern before ordering.

2) Know your era (pre-64 vs. post-64)

Many manufacturers label bases by Model 70 era because receiver details and hole spacing can differ. If a product calls out pre-64, post-64, or “standard,” follow that label and you’ll avoid 90% of headaches.

3) Watch for WSM / WSSM variants

If your rifle is a WSM or WSSM, stick to bases that specifically mention that fit. Those families commonly get their own dedicated options.

---

Pick your style: Picatinny rail vs. two-piece bases

One-piece Picatinny rails

A one-piece rail is the “set it and forget it” option for a lot of people. You get:

• More flexibility to move rings forward/back for eye relief

• A modern, solid mounting platform

• Easy compatibility with many ring styles (depending on the rail)

If you like to tinker with optic position or plan to swap optics, rails are usually the cleanest choice.

Two-piece scope bases

Two-piece bases keep the classic look and often reduce bulk over the receiver. They’re a great match for a hunting rifle and traditional ring setups. If you don’t need extra ring placement flexibility, two-piece can be the simplest, most streamlined route.

---

0 MOA vs. 20 MOA: what you actually need

This choice comes down to how you use the rifle.

• 0 MOA: your general-purpose option for typical hunting distances and everyday setups

• 20 MOA: helps preserve elevation adjustment for longer-range shooting

If you’re building a longer-distance setup and you know your optic will need more elevation travel, 20 MOA is often the smarter buy. If not, 0 MOA keeps things straightforward.

---

What to look for in a quality Model 70 base

Even when fitment is correct, not all bases are equal. Here’s what matters when you’re comparing options:

• Material and machining quality: consistent tolerances help prevent stress on the scope and rings

• Finish: corrosion resistance and a clean match to the rifle

• Hardware: properly sized screws and solid engagement

• Slot design (for rails): consistent cross slots and clean edges make mounting easier

---

A quick note on installation

Always follow the base manufacturer’s instructions for torque, threadlocker, and screw fit. A careful install with the right tools beats “gorilla tight” every time — especially on small fasteners.

If anything feels off during install (holes not lining up, screws bottoming out, uneven contact), stop and confirm fitment before forcing it.

---

Shop Winchester Model 70 bases by your setup

Use the filters and subcategories to narrow down quickly:

• Short action vs. long action

• Pre-64 vs. post-64 fit

• WSM / WSSM fit

• One-piece rail vs. two-piece base

• 0 MOA vs. 20 MOA

Once you’re in the right fitment bucket, choosing between models is usually just about rail style, ring placement preference, and finish.

---

FAQ

How do I know if my Model 70 is short action or long action?

Check your rifle’s model/spec sheet or the cartridge family it’s chambered in. If you’re still unsure, confirm the receiver pattern before ordering a base since the footprints differ.

What’s the difference between a Picatinny rail and a two-piece base?

A Picatinny rail is a single, continuous mounting platform that gives more ring placement flexibility. Two-piece bases are more traditional, often lower profile, and work great when you don’t need extra adjustment room.

Should I buy a 0 MOA or 20 MOA base?

0 MOA is the standard for most setups. 20 MOA is commonly chosen for longer-range builds where you want more usable elevation adjustment in the scope.

Will a long action base fit a short action Model 70?

No. These are different footprints/hole spacing patterns. Always match the base to your action length and the specific fitment notes on the product.

Do I need a base labeled pre-64 or post-64?

If your rifle is a pre-64, you’ll want a base that explicitly supports that pattern. Same idea for post-64. Follow the product’s fitment notes and you’ll be in good shape.

If my holes don’t line up, what should I do?

Don’t force it. Verify you selected the correct action length and era pattern, then confirm the product’s fitment notes. If you’re still stuck, it’s usually a quick fix once you identify the exact Model 70 variant.

---