Odd deal with jts 22.07 in the Evol, and good find with AEA 21.9

[Bladebum]

I do a ton of pesting with my Evol on ground squirrel and birds. I primarily have used 21 grain javelin slugs for squirrels over the years, but as much as I shoot that gets a little pricey and honestly if the wind is mild I don't always need slugs. I have praised jts 22.07 in the past as being the best long range pellet in my Evol..so recently I tried switching back for a bit to them, but something has changed and I cannot get them to shoot. They used to be moa at 100 yards for me, and now they are ALL over the place. I finally got tired of trying and decided to go on a search for some "economy " slugs or heavier weight pellets that would shoot on my tune. Tried Apollo slugs in 18 and 21 grain, horrible. Tried nsa 20.2 again, decent but not great or consistent like they were in the past. Rifle brand 20.52 slugs were not great either. For pellets , I gave the jts 21.53 a try again, and they were decent but also left me wanting more. Then I tried the 21.9 aea, and the Evol loves them. They appear identical to the jts 22.07, but they are very accurate and consistent. Shooting them at about 880 fps and they helped dispatch a problem skunk the other night anchoring it in its tracks. They buck the wind very good for a pellet and hold together excellent past 100 yards. Being much cheaper than the javelins and still hitting hard is a nice compromise.

I really just don't understand why all of a sudden my gun hates the 22.07 jts when it used to love them. Makes me think something was changed in thier manufacturing but I'm really not sure. The jts do feel tight in feeding vs the AEA which are much smoother and have noticed ammo that feeds easier in my Evol tends to be most accurate.

 

[Pumacarl]

I think it's the lead used. Without a doubt I truly believe the lead used by JSB is superior. It requires the least cleaning and is the easiest to clean when you have to. ZAN is good too. I haven't tried some of the smaller brands, but from my reading over the years, it sounds like Varmint Knockers and Griffin use good lead too. I really need to try those at some point.

 

[larry069]

your barrel may be dirty and have a lead build up in it , give it a good cleaning and see if that helps and shoot a few pellets through it to give it time to brake in

 

[Bladebum]

your barrel may be dirty and have a lead build up in it , give it a good cleaning and see if that helps and shoot a few pellets through it to give it time to brake in

That was my first thought as well, but after a good cleaning and reseasoning with only the jts pellets nothing changed unfortunately

 

[Fishing 43]

Supposed to be the same between the aea and jts that you mentioned. Same results as your experience with them.

 

[ctshooter]

There's been a lot of talk about AEA changing their pellet designs for the worse. This is mostly in .30 but I've read posts of it carrying over into .177 and .22 calibers. As AEA and JTS are likely made in the same place it would stand to reason changes may carry over between the brands too.

You can try the AEA .22 equivalent weight pellets and see how they do.

 

[peebrainz]

I just got my evol running awesome with jts 22.07s that I purchased 6+ months ago. I was about to stock up before seeing this post.

Were you shooting the javelins from your evol too? Is it a 15” by chance? If yes, can you say what speed and regulator pressure you were shooting them at?

 

[ctshooter]

I just got my evol running awesome with jts 22.07s that I purchased 6+ months ago. I was about to stock up before seeing this post.

Were you shooting the javelins from your evol too? Is it a 15” by chance? If yes, can you say what speed and regulator pressure you were shooting them at?

Hi - are you asking me? I haven't had my 15" Evol for at least a year or more now. Never really had any luck with slugs. Pellets - my barrel wasn't the best - great to 50 yards and then fell apart.

 

[Bladebum]

I just got my evol running awesome with jts 22.07s that I purchased 6+ months ago. I was about to stock up before seeing this post.

Were you shooting the javelins from your evol too? Is it a 15” by chance? If yes, can you say what speed and regulator pressure you were shooting them at?

Yes mine is a 15" and prior to shifting to the 22 grain pellets I have been shooting javelin 21 grains for a few years. My barrel loves that slug.

I have shot the javelins from what they are right now at about 885 fps up to 970 fps maxed out. My absolute best tune for those was 2250 reg pressure shooting 950 fps. I got 3 mags of shots at that tune. I readjusted the reg to 2000 shooting both the 22 grain AEAs and 21 javelins at the same speed of 885 and I get about 60 shots.

 

[peebrainz]

Hi - are you asking me? I haven't had my 15" Evol for at least a year or more now. Never really had any luck with slugs. Pellets - my barrel wasn't the best - great to 50 yards and then fell apart.

No sorry it was @Bladebum that mentioned the javelins. FWIW, my experience had been similar to yours up until this past weekend. I finally took the time to dial in the gun with the 22.07s and managed some single hole groups at 75 yards..

 

[peebrainz]

Yes mine is a 15" and prior to shifting to the 22 grain pellets I have been shooting javelin 21 grains for a few years. My barrel loves that slug.

I have shot the javelins from what they are right now at about 885 fps up to 970 fps maxed out. My absolute best tune for those was 2250 reg pressure shooting 950 fps. I got 3 mags of shots at that tune. I readjusted the reg to 2000 shooting both the 22 grain AEAs and 21 javelins at the same speed of 885 and I get about 60 shots.

Thanks!! I'll have to give those a try. 217s? I don't shoot a ton and more than anything I need my stuff to be consistent. MRDs aren't and it sounds like the the JTS may not be anymore either.. I may give them another shot tho since the ones I have now are SO good.

 

[Airgun-hobbyist]

One other thing to check as far as lost accuracy goes in a regulated pcp is "what is the current velocity and how wide is the extreme spread?" An inconsistent velocity and wide extreme spread effects accuracy and translates to how your pellets shoot. The Evol's velocity and extreme spread have always been really tight, so if it is not as consistent as it once was then there are two things to do to make it like new.

The first is cleaning and polishing up the valve stem and valve body's bore where the stem travels through it. The exposed stem where the hammer strikes it can get dirty over time, and debris/dirt essentially gets forced into the back of the housing bore. The debris causes the valve stem to rub on the aluminum valve body, and this rubbing leaves aluminum galling that effects the valve's smooth operation, widening extreme spread and effecting accuracy.

The second thing to look at and to clean and re-seal is the regulator internals and seat. Cleaning and re-sealing the regulator allows the plenum to get refreshed as quickly and efficiently as it was designed. A good regulator in any pcp tightens up extreme spread and velocity, improving accuracy.