Ah, okay. I’m thinking the tubing I’m using is working against me. Being so thin, if it’s even a little cocked on the plunger it could dig in and slow the action. Something having a thicker wall might help. On another forum there was some talk of
molybdenum disulfide filled nylon. IIRC it was to be used for a striker in a CO2 gun. I had wanted to try some for a preload spacer but since aluminum works as good as it does, why bother, right?
Yes, just over an inch was my estimate before coil bind. But I have to believe the plunger tube will go bowlegged before that much preload is added.
I think wear would be a problem judging by how the steel wears in the area where the trigger catches. And considering how much work would be involved with making one, it would be a shame to wear it out. What about using an overlay on the high-wear area made of a thin piece of steel, like a feeler gauge?
Okay, the No. 25 shot tube- I had almost forgotten about that in all the other discussions we’ve had. I have absolutely no doubt that it helps MV, and that’s not just a WAG- I’ve seen an increase in MV is every last BB gun I’ve used the 25 shot tube in compared to the original shot tube, even with original shot tubes that are in pristine condition. The percentage of increase in MV is also loosely tied to the base MV; the more MV, the more percentage of the increase.
Well, the air tube is right up there with the plunger tube as being the links to better performance, so after seeing what you’ve gotten already, I’m sure not doubting 400-plus being a possibility with the new tubing! And you being successful at drilling them to 7/64” is definitely a plus. As you know, the seemingly small difference in 3/32” (0.938”) and 7/74” (0.109”) is a large difference in area, relatively speaking. And we need all we can get in this regard!
Ultimately, engleracing’s idea of different tubing altogether will very likely prove its worth, and I’m anxious to see your results. If it pans out like we think it will, I’d definitely be in for a couple myself, so if you could post the info needed to order it, I’d appreciate it.
I listed the RR as being 1-7/8” but I’d want to remeasure it before saying that’s absolutely correct. It will be very close to that, though. I suspect the 499 will be the same but next time I have the stock off, I’ll measure it to see for sure.
So yeah- we’re not done yet!