22 Rifle lands / compare discussion, significant differences

[GuideDog]

The bore shots are labeled by the MFG below. Its interesting to see the differences in design, finish. All 3 were fired 1 day prior, Bore snaked only to clean.

CZ 457 - Clean defined edges on lands and bore is super smooth.
Volquartzen (VM-22) - still fairly defined, definitely the shiniest finish. I can't turn the borescope brightness down any further. The finish is like a mirror.
Vudoo - Notice the lands at the chamber are beveled about twice the length. Bore is not as bright but maybe the bore snake didn't clean as well.

The differences are pronounced in land / bore construction. There looks to be slightly different size lands too. All 3 for these shoot sub-moa at 50, It's sometimes a close tie on grouping but Vudoo always wins. They all have cold bore POI difference. Volq and CZ shoot very similar using the same ammo. I shoot SK Rifle match or Lapua Center-X. Vudoo loves X but SK shoots almost as good, just more flyers when X has hardly and or certainly much less. That's a bit of background on her rifles.

Just thought it would be interesting to show the differences, at least here's a reference. Perhaps we can build this thread with other 22LR similar bore shots. I would like to see a Anschutz, KIDD, RimX, Bergara, Tikka etc and other rifles, mostly used in matches.

 

[Dstoenner]

The CZ barrel is made by cold hammer forging so that is why its land and grooves are so perfect. They probably polished the mandrel till it shined like a mirror. Since they have different chambers for different models I would assume that once they have made the barrel they chamber it on a lathe then create the finish. I don't know if it is nitrided or melonited but mine is a black as the ace of spades. Mine also shoots great.

The volquartsen definitely has a longer leade which means a shallower angle. I would guess that it doesn't engrave the bullet much if at all. Seems strange but then maybe it is a sporter chamber??

David

 

[RockeyRoad]

The CZ barrel is made by cold hammer forging so that is why its land and grooves are so perfect. They probably polished the mandrel till it shined like a mirror. Since they have different chambers for different models I would assume that once they have made the barrel they chamber it on a lathe then create the finish. I don't know if it is nitrided or melonited but mine is a black as the ace of spades. Mine also shoots great.

The volquartsen definitely has a longer leade which means a shallower angle. I would guess that it doesn't engrave the bullet much if at all. Seems strange but then maybe it is a sporter chamber??

David

No worries but it’s the Vudoo with the longer ramp. It also shoot repeatedly the best although the Volquartsen semi-auto is perhaps passing the CZ on repeated accuracy. It has a mirror finish on the barrel.

On the cold forging I would think there is some type of final machining for clean up, but maybe not.

 

[obx22]

This pic gives a good graphic of the rifling shape in a Sako P94S Finnfire. I was honestly surprised at the ratchet shape as the only unique thing I’d read about these was the 16.5 twist bore.