Does lubrication with Krytox improve performance?
I first heard about Krytox from Leo Gonzales. Leo is a fantastic WFTF competitor (he placed 4th in the last WFTF World Championship!) and he knows a lot about springers, so when he makes suggestions, I listen very carefully!
In this chapter I switched my LGU and FWB 124 to Krytox and took a look at their performance before and after the switch.
Before Krytox, both rifles were sparingly lubricated with a combination of moly and Superlube, with the moly mainly for the metal parts and Superlube for the synthetic piston seal. This was the lubrication used in Chs. 1 and 2 of this blog.
Before lubricating with Krytox, I first thoroughly degreased the mainspring, piston, piston seal, and compression chamber. Then I applied GPL 205 very sparingly, wiping off after applying. Krytox is much more expensive than molybdenum disulfide or Superlube, but Leo pointed me to an online store with pretty reasonable prices:
Figure 5.1 shows how Krytox affected the accuracy of my LGU. Accuracy was about the same after Krytox was applied, where four 10-shot groups were made off the bench at 20 yards before Krytox, and another four 10-shot groups were made after Krytox. No warm up shots were taken after the Krytox lubrication and the last 10-shot group with Krytox is pretty nice, with a ctc distance of 0.090”, so maybe accuracy is improving as the rifle starts settling with the new lube? As I discussed in Ch. 3, this group needs to be taken with a grain of salt!
Encouraged by what Krytox did to my LGU, I decided to try it in my FWB 124. Surprisingly, and unfortunately, Krytox had a very different impact on my FWB 124! With the Krytox-lubed LGU, MV remained about the same but MV fluctuations dropped by a factor of two. With the Krytox-lubed FWB 124, MV dropped by about 35 fps and MV fluctuations stayed about the same, as can be seen in Fig. 5.7. Figure 5.7 a) and b) show that accuracy was about the same or perhaps a bit worse with the Krytox. Maybe it will take some time for the rifle to settle in with the Krytox? One possible explanation is that my FWB 124 was lightly dieseling with the moly/Superlube, which have a lower ignition temperature than the Krytox, so that pushed the MV up a bit? That’s just one guess.
I’m very intrigued how/why Krytox could affect two 12 ft-lbs springer so differently. Maybe it has something to do with the differences in piston seal material? I would very much like to understand the cause(s) of these differences and believe that will teach me something new about springers. If you have any ideas, please let us know.