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It’s been a while since we’ve heard from Ryan and Tanya Avery on the Rokcast. They join Robby talking about the season upon us, the arrival of Robby’s long awaited Rokstock/Tikka/6UM rifle, and more random thoughts.

Since this episode recorded, Robby’s put about 30 rounds through the new Rokstock topped with a Swarovski Z5 2-10X https://www.swarovskioptik.com/us/en/hunting/products/rifle-scopes/z5-i-plus/z5-plus/z5-plus-2-10×42-bt

Shooting the Sierra 115 grain DTAC NR in front of 64.5gr of N570, Robby chronographed the load from his 19-inch barrel at 3155fps (his 270 WSM was clocking a 140 grain Berger at 3249 from a 24-barrel for comparison.) The overall length of the new rifle is an inch shorter–including the Unknown Munitions Suppressor–compared to the 270 WSM. The Rokstock based rifle weighs in at 7lb 15oz, just two ounces more than the 270 WSM. Accuracy for two (3) shot groups at 200 & 300 yards averaged at just over 1MOA: 2.25″ & 3.5″ respectively.

Since Robby primarily shoots hash marks vs. dialing, he was particularly interested in the trajectory. Even with 100 fps decrease, the Z5 hashmarks lined up almost identically to the Z5 on his 270WSM.

-Center crosshair = 100/200 yards

-1st hashmark = 300 yards

-2nd hashmark = 400 yards

-3rd hashmark = 500 yards

-4th hashmark = 570 yards

The Z5 does have an elevation turret but Robby will need some time to learn it and report back.

For those interested, the 6UM is made from the 6.5 SAUM necked down to 6mm with the shoulder blown out to 40 degrees. This cartridge was primarily developed by Unknown Munitions in Post Falls, Idaho. Contact https://www.unknownmunitions.com/ for more information.

Read more about Robby’s first step down from big magnums in his 2015 blog post “Goodbye 7mm Rem. Mag, Hello 270WSM” here https://www.rokslide.com/goodbye-7mm-rem-mag-hello-270-wsm/

Rokcast is powered by onX Hunt. For 20% off, use Promo Code “Rokcast” at onX Hunt here https://www.onxmaps.com/hunt/app

You can find Robby’s books, Hunting Big Mule Deer and The Stories on Amazon here

or signed copies from the Rokslide store here

Hunting Big Mule Deer book
The Stories book

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Robby Denning
Robby Denning
Robby Denning started hunting mule deer in the late 1970’s, only missing one season in 35 years. At 25, he gave up the pursuit of all other big-game to focus on taking the best bucks possible. He began hunting the West on a DIY budget hunting an average of 30 days a year for mule deer. Robby loves the hunt as much as the kill and the entire process from research to scouting to hunting. He’s killed four bucks over 200 inches in the last 15 seasons, mostly on easily-obtained tags. He owns a public-land scouting service and runs a private-land outfitting business helping other hunters in their pursuit of deer and elk. Robby has scouted and hunted literally thousands of square miles of mule deer country and brings a wealth of knowledge about these experiences with him. To him, the weapon of choice is just a means-to-an-end and will hunt with bow, rifle, or muzzleloader – whatever it takes to create an opportunity to take a great mule deer. He is also the author of "Hunting Big Mule Deer" available on Amazon. Robby believes all of creation is from God for man to manage, respect, and through which to know its Creator

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