Trying to Pick a Slug for my AEA Element .45 cal MAX

Hey guys, I am trying to figure out which slug to order for accuracy in the new AEA Element MAX .45.

Gun here: https://www.thepelletshop.com/collections/vendors?q=AEA Precision Airguns

I'm going with NSA. Should I get .457? Below are the choices:

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Slug your barrel and get the groove diameters. AEA barrels are notorious for being completely out of it spec with the rest of the industry.

I’ve had 2 AEA rifles and sold them. I think they are horrible guns but that’s just my opinion based on my experience with two of their models. One was a 457 and the groove diameters measured .46283. I cast all of my own ammo for all my rifles and this out of tolerance spec was horrible. I slugged another buddys barrel and it was .45596. So going from .45596 to .46283 is a BIG swing in diameter. I’m glad that at least I could cast ammo for it but it’s still shot like crap.

The “30” cal AEA I had slugged at .30651, again a terrible manufacturing spec.

I’ll never buy another AEA.
 
One sided conversation here...

Mr Hollopoint just informed me:

"Since it's a single shot, we won't have any limitations like the challenger or hp series.
I suggest the 170, 200 and 260
I don't think the power curve will do well past the 260, even though the 280 and 300 will fit.
I'm working on a 220 grain nut

Hey guys, I am trying to figure out which slug to order for accuracy in the new AEA Element MAX .45.

Gun here: https://www.thepelletshop.com/collections/vendors?q=AEA Precision Airguns

I'm going with NSA. Should I get .457? Below are the choices:

View attachment 334224
View attachment 334225
II bought some mr hollow point 280 I Shot. about 10slugs My gun started leaking out the barrel I think the slugs are too heavy Have not had time to disassemble. I think it may have Bent The Vow steam