A custom .375 Ruger…

About six years ago I had an urge to build a custom rifle. Some folks consider a custom rifle to be one you build from the ground up.  For others, a custom rifle is one you buy off-the-shelf and then modify.  My idea of a custom rifle starts with a barreled action (the metal parts) and an unfinished, semi-inletted stock (I’ll explain that “semi-inletted” descriptor a few paragraphs down). I had built rifles like this a couple of times in the distant past and I had the urge to do it again.

My objective was to build a rifle chambered for the .375 Ruger cartridge. The .375 Ruger was a joint project between Hornady and Ruger. The idea was a cartridge faster than the .375 Holland and Holland (a classic African big game cartridge), but shorter so it could cycle through a standard-length rifle action. When the .375 Ruger came out 10 years ago, everyone who tested it said it hit both marks. That was enough for me; I needed a .375 Ruger rifle in my life.

It had been a long time since I tackled a project like this, and I was surprised when I looked for a stock. Three or four decades ago several outfits offered semi-inletted stocks.  Most of them were in Missouri (I guess that’s where all the good walnut is).  The stock companies I knew decades ago (Fajen, Bishop, and others) are gone. The demand isn’t there. Millenials don’t shoot much, gun laws are more restrictive, and shooters today go for black plastic (there’s no accounting for some folks’ taste, I guess).

A semi-inletted stock is one that 95% inletted (that’s what the stock companies say); what is euphemistically implied is that you need to do just a bit more to fit your barreled action to the stock.  That 95% inletting claim always brings a laugh, because final fitting of the action to the stock takes a ton of work…something way more than the implied final 5%.

Richard’s Microfit is an old-line gunstock company right here in So Cal. I called Richard’s to ask if I could visit and personally select the piece of walnut I wanted, the answer was yes, and it was time for a ride out to the Valley.

Richard’s had a lot of lumber and I selected a piece of English walnut with lots of figure and grain that ran lengthwise (what you want in a magnum rifle, as it makes the stock stronger). The contrasty grain was a difficult to see in the blank, but the Richard’s people knew how to mist it with water and that made the walnut come alive. I specified a solid black rubber recoil pad, an ebony pistol grip cap, and a matching ebony fore end tip. The price went up, but I don’t do this sort of thing very often and the heart wants what the heart wants.  My heart wanted ebony accents.

Few rifle manufacturers sell barreled actions today (they all used to), but Howa still does and they had one in .375 Ruger. It is a stout thing with a stubby 20-inch heavy barrel. Howa makes complete rifles under their own name and they also sell to other manufacturers (the Weatherby Vanguard, one of the world’s great rifles, is made by Howa).  A custom rifle I built 40 years ago (a .30 06) had a Howa barreled action and I knew from that project they were good.

I took a good 80 hours to fit the barreled action to the stock, but I was in no hurry (it’s easy to take wood away; it’s a lot harder to add it back on), and I glass bedded the action with AcraGlas for added accuracy. That involved coating the barreled action with a release agent, mixing epoxy and glass fibers and slathering the mix in the stock, placing the barreled action in the wet epoxy, and then clamping it all together while the epoxy cured. A day later, I pried the barreled action out of the stock and oila, the action now had an exact fit to its glass bed.

The next steps involved shaping the stock exterior and the ebony accents to my tastes, and then sanding everything with 100, 200, 400, and then 600 grit sandpaper. That required another 60 hours.  Then it was on to applying the finish.  I like TruOil. The drill is to apply the first coat of TruOil heavily (to allow it to fill the wood pores and soak into the walnut), wait a week, and then use 0000 steel wool to remove the excess. Then came TruOil Coat No. 2, a 24-hour  cure, and more steel wool. Then another coat and another 24-hour cure. It would be 10 coats total in this manner. With each coat of TruOil the inner beauty of the walnut emerged further.  This is one of the best parts of building a custom rifle…finishing the stock and watching the walnut wake up.  It becomes a living thing, changing colors and character as the light hits it from different angles.

The feeling of satisfaction that comes from fitting, bedding, shaping, and then finishing a custom gun stock is profound and difficult to describe.  Applying an oil finish is the best part.  You get a high gloss finish, which can be left that way, or you can knock it down with the steel wool again for a sublime satin low gloss finish. That’s what I did. Shiny looks good but it is reflective and that’s bad for a hunting rifle. And that’s what this .375 is: A hunting rifle. For pigs, to be specific.

While all of the above was going on, I found a used 4X Weatherby scope in a local gun shop’s parts bin.  Old Weatherby scopes are stunningly clear and they generally go for something north of $200 when you find them (which isn’t often because they stopped making them more than 30 years ago).  I prefer a simple 4X scope even though few manufacturers offer them (it’s mostly variable-powered contraptions today, something I view as a solution to a problem that doesn’t exist).  The gunshop guy told me I could have the old Weatherby scope for $25.  I couldn’t pay him quickly enough. I mounted the scope that night.

How does the rifle shoot?  I’m happy to tell you that the answer is very, very well, and it does so with nearly every load.

I built the .375 rifle to shoot cast bullets. They’re less expensive, they’re cool, and I have a local caster who makes good ones.  For my cast 275-grain bullets, I use 30.0 grains of SR 4759 propellant, a load that consistently delivers tight groups at both 50 and 100 yards. I use the same powder and charge weight with 270-grain jacketed soft point Hornady bullets, a load that is scary accurate (as in one-hole, 5-shot groups at the 50-yard mark).

The plan is to hunt pigs with cast bullets, but the rifle is accurate enough to go after grasshoppers with the jacketed load.  I haven’t shot the jacketed bullets at 100 yards yet, but I will the next time I’m at the rifle range. Both loads, according to the reloading manuals, are pushing the bullets at about 1800 feet per second. Recoil at those velocities is just shy of being unbearable (it’s stout, but manageable). This rig is a shooter, it’s a powerhouse, it groups well, and it’s fun!

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Hey, check out our other Tales of the Gun stories, and for another take on building a modern sporting custom rifle, take a look at this Tavor X95 project!

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