Long Range Hunting Online Magazine

300 Remington Ultra Magnum ABS Barrel Review

300 Remington Ultra Magnum ABS Barrel Review

By Michael Eichele

My buddies Heath and Jess and I were on our way out of a large valley in the Chugach mountains after I harvested a 55” bull moose with the 300 RUM that I had built specifically for this moose in this valley. The rifle was built around a Remington 700 bolt action and McMillan stock. My barrel choice was a 27.25 Lilja 12x in NBRSA HV taper. The scoped rifle weighed in at 16.5 pounds with ammo and bipod. After packing this rifle into the high steep country to access this remote valley and back up and over lugging this chunk of steel around, I realized how much my upper body was screaming at me. I decided then and there to do something to lighten this rifle up.

300 remington ultra magnum abs barrel review

After a brief phone discussion with Mike at ABS barrels I was sold. I paid for it right there over the phone. Mike stated that the turnaround time was typically about 3 months but he said he had one barrel in stock due to a deal that fell through that was exactly what I was looking for and that he could get it to me with in two weeks.

To make a long story short and without going into details, one year later, I finally received my barrel. Now for the good news. Mike threw in a titanium muzzle brake custom built to my exact specifications for free for my trouble. Upon getting her back from my rifle smith, I gave her a good cleaning from the test firings and was amazed that there was absolutely NO copper to be removed.

Day One At The Range

I never judge a rifle based on my first day at the range. There are too many mental distractions and hopes to really concentrate on the task at hand. However, there were 3 groups that showed signs of real promise and with excellent hunting bullets to boot! I was getting really excited. The very first group was right at 1 MOA. A couple of groups later it shot a .75 MOA group. The last group was 0.4 MOA.

Load notes:

Best load tested on day one.

86.0 RL-25 with the 200 ACCUBOND
Velocity 1: 2941, Velocity 2: 2916, Velocity 3: 2942
Accuracy = 0.4” @ 100 yards.

300 remington ultra magnum abs barrel review

Day Two At The Range

Day two was really exciting. I only fired 2 groups and went home. I only fired two because I shot the lowest charges I had and decided that if they weren’t max loads, they were max enough. The first group was .486” at 100 yards. The second group was .241”.

Load notes:

Load one: 91.0 RL-25 with the 200 ACCUBOND
Velocity 1: 3236, Velocity 2: 3177, Velocity 3: 3191
Accuracy = 0.486” @ 100 Yards. Perfect extraction, primers look good, no ejector marks.

300 remington ultra magnum abs barrel review

Load two: 95.0 RL-25 with the 180 ACCUBOND
Velocity 1: 3412, Velocity 2: 3342, Velocity 3: 3377
Accuracy = 0.241” @ 100 Yards. Perfect extraction, primers look good, no ejector marks.

300 remington ultra magnum abs barrel review

Day Three At The Range

I am not one to settle for high extreme spreads. Later I learned that my case necks were in need of annealing and that RL-25 actually gave me the lowest ES with proper neck tension. Nevertheless, I had to see what H1000 and RETUMBO would do.

Load notes:

Load one: 95.0 RETUMBO with the 180 ACCUBOND
Velocity 1: 3340, Velocity 2: 3315, Velocity 3: 3330
Accuracy = 0.656” @ 100 Yards. No pressure signs.

Load two: 91.0 H1000 with the 180 ACCUBOND
Velocity 1: 3144, Velocity 2: 3154, Velocity 3: 3135
Accuracy = 0.6” @ 100 Yards.

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