Diana 460 Magnum or Sig Sauer ASP20?

I have the diana 48, hw97, hw80, and asp20. Somehow the 97 has a better fit and finish, but the asp is nicely executed. The matchlight trigger is no rekord, but mine is abosultely fantasic especially for hunting. My trigger breaks at 2lb 4oz, but "feels" lighter than that. Ridiculously predictable breakpoint with zero creep. Just feels great to pull. I get slightly better groups with the 97, but much more power with the asp20, which is why I got it. I routinely get ragged one hole groups at 25 yards with the asp. I had to get use to the black beech stock on the asp, but I love it now, and really enjoy the overall "firearm feel" to the whole gun. The shot cycle of the asp is VERY smooth and short thanks to its well executed piston, and cocking effort is near 33 lbs on mine. "Breaking" the barrel takes a little effort, but break in and technique makes this easier over time.



You can't go wrong with either! Good luck.
 
The Sig is smoother than the 460 out of the box. The 460 is tunable, some may say needs to be tuned, and you can get parts for it for the rest of your life. Sig has said they will not sell replacement parts, so once the warranty is up..... I have had the Sig since November of 2018 and still like it. My next springer will be the new Laminated stock RWS 54 when they become available.


 
I've never owned a under lever but accuracy advantage would have to go to the fixed barrel 460. Although it wouldn't be much of an advantage because of the Sigs wedgelock barrel system. Power level advantage clearly goes to the 460. Cocking effort has to be taken into account when discussing power levels. My ASP20 cocks about the same as both my RWS 34's. The Sig is much smoother as you would expect from a gas ram rifle. I'm sure the cocking effort on the 460 is pretty stout. Advantage Sig ! I like the looks of the 460 better than the Sig. I really don't care for the looks of the synthetic stock Sig at all! But at $349 a slight edge to the Sig regarding cost. I'd say you have a tough decision to make and you won't go wrong on either choice.

Where in California do you live ?
 
Cocking effort on the 460 isn't too high, IMO. To put this in context, I'm a strong guy who spent years in the gym so it may be "heavy" for others. Several people mentioned difficulty cocking the 430L after purchase with at least one stating he sold it for that reason while I (and others) noticed no difficulty cocking that rifle at all. Such a factor is directly relative to the individual and not something easily quantifiable from person to person. I'd suggest trying one or something similar if possible if your size/strength is on the lower end (or the years have totalled up a bit higher for you). I'm now over 60 and might complain about cocking such rifles as my Hatsan 125 or Diana 460 in the future but as of now it is a non-issue for me.
 
I've owned both. As previously stated, the 460 is the winner in the power category, and in appearance. But, I kept the ASP20. Both were in .22 cal. The Sig doesn't take a backseat to the Diana in terms of accuracy. I have several fixed-barrel guns (some them PCP), and this one will give ANY of them a run for their money. Cocking effort goes to the Sig. I also have the synthetic stock version, and it's not particularly attractive. The wood version might help some, but it's just not as "pretty or svelte" as the Diana. You can't go wrong with either. You WILL find many having had issue with the Diana's cocking pins breaking, or wearing out quickly. Mine included. Bad design there. The Diana shoots with the authority of a powder-burner, if that's your thing, but the ASP is smoother. I shot several 5-shot groups at 28 yards recently, using the second-rate Crossman pellets from Wal-Mart. I didn't anticipate anything to write home about, but with 6 groups, every one could be covered with a dime, and three of them could be covered with my shirt button !!! I'm still shaking my head on that one.