I like this post. I have a stock a
Zelos .22 cal modded only by 3 things the 500 cc bottle the adapter , and I slipped a piece of
clear plastic tubing over the barrel under the shroud , and back on the exposed part by my face. I only have 15 yards in my back yard shooting range.
I got the reg set at 2,900 the hammer spring 5 turns in , and the 28,s are going 885. I'm getting same hole accuracy from the Apollo 28 grain HP dish base slugs. I don't think at that close range they have even stabilized. The new double mag holds 36 , and that's how many shots I get from full fill to 3,000 which is just above the reg setting. In PB's I used to buy 4 boxes of various ammo whenever I got a new rifle to see which one worked best , but then started to reload with these variables case , powder ,bullet ,primer. Until I was able to dial in the perfect round. In Airguns the Zelos only has mags I mean there may be a single shot tray but I don't care for them so I never looked. One thing you did not mention is the possibility of lube which I don't use because I never cleaned the barrel as lead itself is lubricating , and the competition shooters is where I read they don't clean the barrels , so I don't either. The probe idea is great , but the dish base slugs work great for mine , so it would be finding the slug that works well for your probe , and not the other way around. A dedicated sluger might be the way to go
I have 2 barrels for my Zelos , and they switch very easy , so I use a dedicated slug barrel for my slugs. With the Zelos being able to easily mod to the FX liners Which come for both slugs , and Pellets might be an Idea. Lothar has the new polygon barrels which provide less friction as far as rifling goes. I'm going to say it's just a trial , and error thing with so many variables , but from reading here I learned the the heavier slugs , or pellets moving at 920 to 950 seem to be the most accurate. I want to see where this goes. OldVet
Edit: Great video , and after watching I thought maybe a small adapter added to the probe could be added to bring the shoulder out a little more.