What are the dimensions of a Marlin microgroove barrel?

Factory specifications for groove diameter is listed at .4107″, but these barrels sometimes run a little bit larger than this. In 1972, Marlin introduced the Model 1895 chambered in .45-70. Initially, these rifles were made with 8-groove Microgroove barrels, with grooves that were .060″ wide and .003″ deep.

When did Marlin come out with MicroGroove Rifling?

On July 29, 1953, Marlin introduced Microgroove rifling in their .22 rimfire barrels, with 16 grooves that were .014″ wide, and nominally .0015″ deep. In their 1954 catalog, they outlined numerous advantages that this new form of rifling had, including better accuracy, ease of cleaning, elimination of gas leakage,…

What kind of barrel does a Marlin 44 Magnum have?

Also in the 1960s, Marlin introduced the .44 Magnum to the Model 336. This rifle was fitted with Microgroove barrels, containing 12 grooves that were .062″ wide and .0043″ deep.

What kind of rifling does Marlin centerfire use?

Marlin continued to experiment with Microgroove rifling in their centerfire barrels, primarily in the Model 322 chambered for the .222 Remington (the highest velocity round that Marlin chambered for).

How many grooves are in a microgroove barrel?

.35 caliber — 16 grooves, .040″ wide, and .002″ deep (this would be changed in 1968 to 12 grooves, .055″ wide, .0028″ deep) Note that by conventional standards, all of these grooves are fairly shallow. Microgroove rifling makes up for this by having many lands/grooves to grip and spin the bullet.

Can a cast bullet be used in a microgroove barrel?

Since Microgroove barrels are commonly oversized, this means that the cast bullet must also be oversized to effectively “fill up” the grooves.

Can a micro groove barrel cause headspace?

AND low pressures can cause symptoms similar to high pressures. The gun is brand new, 7months old, and does have a micro groove barrel. I am not having any issues with any other factory loads or any of my other tested reloads, so do not feel headspace is an issue.

When did the Marlin Microgroove rifling come out?

On July 29, 1953, Marlin introduced Microgroove rifling in their .22 rimfire barrels, with 16 grooves that were .014″ wide, and nominally .0015″ deep.

Is the micro groove on a Marlin too long?

If you use the one for the Marlin express by accident and seat to the crimp groove it is too long to go through the 30-30 action. They are crimped the same as my other reloads and I have no problem with any of them, so crimp pressure shouldn’t be the issue. I have no control over Hornady’s crimping on their factory ammo.

How much does a Marlin win 20 barrel cost?

30-30 Win 20″ $10S&H NoCCFees 20 inch ” barrel PRICE: $610.10 MANUFACTURER: Marlin

What kind of barrel does a Marlin Model 39 have?

This is a Marlin Model 39 HS model with a 24 inch octagon barrel HS (High Speed) that has a bright, shinny bore. It retains about 45-50% of the original case colors on the action.

When did marlin start using Microgroove rifling for rifles?

The results of this testing convinced the Marlin engineers that Microgroove rifling was indeed suitable for high-velocity centerfire rifles and in early 1956 Marlin announced that all of their high-powered rifles would henceforth be equipped with Microgroove rifling.

How much does a Marlin 22 LR barrel cost?

22 LR -Beautiful Shape +Marlin/Glenfield Scope 18 inch ” barrel PRICE: $405.00 MANUFACTURER: Marlin