It didn't take me very long to get the MagnetoSpeed set up on my two PCP guns, a Factor RC and a Prod / Marauder Pistol, both in .22 cal. Once the spacing of the Bayonet and the number of magnets was determined for each gun / pellet / speed combination, I got zero errors in 90+ 22 cal shots.
See this link on AGN by
fe7565 on how to use the magnets, which makes the Sporter version of the MagnetoSpeed work with pellets and 22 rimfire at half the cost of the V3. Their specs say centerfire cartridges only with the Sporter.
I found that with smaller and lighter pellets two Neodymium magnets were needed on each of the two internal magnet positions. The sensitivity was usually set to Hi 2 but with the Monsters it worked better at Hi 1. With the bigger pellets and faster velocity settings, one magnet on each spot usually worked well. The design of the clamping surface seems to tip the bayonet up slightly on my straight sided straight shrouds, so I put a shim under the front part of the bracket to tip the bayonet down until it was level with the bore line. I would like to find a light weight but very rigid aluminum tube that barely fits inside the bore for alignment. My cleaning rod is too heavy and has too much flex to make it a quick process. Though, once the settings and spacing are determined, you don't need to check the spacing again with a rod. I found that inserting the rod with the muzzle pointing up gave a more accurate clearance check. It won't work at all without the magnets, no matter how close you get the sensors to the bullet path.
I haven't tried it yet with .177 pellets as I rarely shoot my .177 guns anymore, but will do a test later and will report back. If I was serious about this hobby and had thousands invested in gear, I would probably get a radar style chrono like the FX that links directly to my phone, but this is great for what I want right now, plus it works with my powder burners as well which the FX would not!
Factor RC 22 Cal These numbers were with the hammer spring set to max, using the three position power dial and the regulator set to 140 BAR for everything. The bottle pressure was kept between 2900 psi and 2200 psi. The Factor RC is as shipped from the factory with no mods. Note: I did take extra care in firing the strings for accuracy as I already knew that these three pellets would shoot well at 50 feet. I will test some H&N slugs soon.
22 CPHP 14.3 - Power at #1 - 10 shots - All shots touching at 50 ft (Max distance on my indoor range) - High - 662
- Low -654
- ES - 8
22 CPHP 14.3 - Power at #2 - 10 shots - All shots touching at 50 ft - High - 842
- Low - 833
- ES - 9
22 CPHP 14.3 - Power at #3 - 10 shots - The group opened up about 4x larger - High - 984
- Low - 972 (Only one at this speed. Next lowest was 976 for an ES of 8)
- ES - 12
JSB Jumbo Heavy 18.3 - Power at #3 - 5 shots* - All shots touching at 50 ft *I was running out of JSB pellets so I stopped at 5 shots. I only sot the JSBs at power dial #3 as I had no interest in shooting them slower.
- High - 909
- Low - 904
- ES - 5
JSB Jumbo Monster 25.39 - Power at #3 - 5 shots* - All shots touching at 50 ft - High - 820
- Low - 817
- ES - 3
22 Cal Prod / Marauder Pistol with no mods 22 CPHP 14.3 - 2600 psi down to about 2000 psi - 10 Shots into about 3/4" CTC at 50 ft. Velocity dropped steadily with each shot. My Prod does not like the CPHP. The Meisterkugeln shoots the best of all my 22 cal pellets in the Prod. I will be running them across the chrono as soon as my next shipment arrives.
- High - 664
- Low - 634
- ES - 30
22 CPHP 14.3 - 10 shots - 1900 psi down to about 1300 psi - Slightly larger group but still fairly close to the same POI as the string above. - High - 626
- Low - 561
- ES - 65
