full pressure

Has your velocity changed? 

I "filled" my Daystate the other day, no difference in point of impact.

I understand the Renegade is not regulated.

One thing it did do... I went from an H&N, non-led, 12.35gr pellet, to an Exact Jumbo, 15.89 gr pellet, and the point of impact changed by almost 1-1/2" to the right and that was only at a 20' distance. I recentered the sight, all is well. The height did not change at all.

Mike

When I top off my TalonP the first few shots are inconsistent and I don’t get really good accuracy until I get down to 2600 psi or so at which point it is consistent down to 1600 psi or so. 

That's really good news! Usually airguns shoot Too LOW!

Kentech, I'd shoot a full string from your full fill pressure over the chronograph recording every velocity and about every 5th shot record the gauge pressure the best you can. When you notice that the velocity is really falling off stop there. Now look at the recorded velocities and your gauge pressures. You'll notice that more than likely the velocities will start out lower, start increasing and then start going lower again. What I'd do is determine what's acceptable to you for extreme spread. Maybe that's 20fps or 30fps, maybe less. Now find the highest velocity shot and find the two points on both sides of that peak velocity that give you that over all 20-30fps maximum ES. You can associate a gauge pressure when you started seeing that first "good" velocity and then determine the gauge pressure when you saw the last "good" velocity. Those two pressures will be your new fill to pressure and your stop shooting pressure. Or once you find the ideal fill pressure just keep track of shots or magazines used before you need to refill. And yes that's the great thing about regulated guns. Hope I didn't confuse you like I just did myself. lol

Jking

Just go to ACE HARDWARE and buy a few weaker hammer springs same outer diameter to try over the chrony buy varying tensile strength weaker springs plus one exactly the same strength as the original (longer is fine) to experiment with since you never want to chop the original factory spring. Long is good since you can cut them shorter. You may experience valve lock from start pressure shoot real slow that's fine no worries keep shooting and record all shots and take hand written notes what psi each and every shot is at so you know what's your optimum start fill pressure is going to be. This is the cheap unregulated way to tune it that may just be good enough for you. You will need the weaker springs anyway if you do end up installing a regulator for it in the future.

You ever make yourself a breakfast burrito with bacon, and it just so happens all your bacon ends up in 1/10th of the burrito, leaving the other 9/10th of the burrito unsatisfactory, while the 1/10th of the burrito that contained all the bacon (luckily it was the last portion) was orgasmic?



I shoot my gun high, why shouldn't my gun shoot high too?



You need a chronograph to determine if there are any issues of concern with your unregulated rifle, shooting 'high' is, well..among many things, up for interpretation and can be a result of too many things worth playing detective over without the rifles conditions known (velocity at your full pressure versus velocity at the end of your pressure range)

Is this why one should be looking at products that are "regulated"? No.

I suspect whatever you did to your Bandit between it not holding pressure then and it holding pressure now might be the reason for your point-of-impact change. Some guns... make that, MANY guns suffer POI changes for little to no reason(s) whatsoever; and the Bandit ain't exactly "built like a bank vault".