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RWS Diana 48 .20 cal has got me inspired

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    JohnnyPiston
    Participant
    Member

    Hey guys! 

    I haven't tried the JSB 15.9ers…yet. I do suspect that they'll give lower fpe. I'll try them and update here๐Ÿ˜‰

    c_m_shooter, what fpe were the 2 JSB offerings giving you out of your gun? Congrats on the new acquisition ๐Ÿ‘๐Ÿป๐Ÿ‘๐Ÿป!

     

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    c_m_shooter
    Participant
    Member

    The 13 grain jsbs were going 780-795 fps.  I didn't clock the 15's, but there isn't a noticible difference in trajectory from the 13's once I rezeroed at 25 yards.  It is pretty flat from 18 to almost 40 yds and much less wind drift at 50 than my 12fpe .177's.  

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    JohnnyPiston
    Participant
    Member

    A quick note on the steel RWS Dynamit Nobel prize winning one-piece adjustable mount๐Ÿ˜†. After a complete disassembly and thorough cleaning, I decided to use a Bushnell Elite 4200 8-32X40 Mil Dot (yes sir, one of the good ones!) with the mount.  

    Here's the mount receiving VIP Spa treatment prior to installation and set up: https://www.airgunnation.com/topic/ever-seen-or-know-about-this-1-piece-adjustable-mount/?referrer=1

    As you can see, it relies on an all steel, robust construction and precise tolerances as well as steel grub screws to secure the mount posts in place. I did my homework obviously and saw that in the past many have complained about the design not being ideal to secure a scope especially when atop a magnum, heavy recoiling springer. 

    My solution was to "permanently set and affix" not only the grub screws with Loc-Tite Red (Permanent) 271 but also the:

    a) bottom rings to their respective "ring support pillar/block"

    b)the ring support pillar/block to the inside frame of the one piece mount base. 

     *Chemically bonding 3 independent parts together as one with the Red 271 with its 3000 PSI holding power for lasting reliability. 

    Getting the scope precisely dialed in so that it was optically centered for windage and elevation at 35 yards took a considerable amount of time and very fine adjustments. It was kind of fun๐Ÿค“. 

    Once the height and cant of the rings were in final position, the distance from the bottom of the 2 rings was measured from the top of the one-piece base so that I had a reference to return to should something change when applying the Loc-Tite 271. With the scope now removed and only the bottom ring in place, Loc-Tite 271 was applied through the open hole at the bottom of the mount which the pillar base occupies…One grub screw at a time was threaded out, Loc-Tited and threaded back in, then alternating to the opposite side…Scope back in place, the 2 base clamp screws and 4 screws for the upper and lower rings were then secured with..you guessed it, more Loc-Tite 271.

    After a generous cure time of 72 hours, the moment of truth: test shots to determine if the final and permanent position of the mount is where I left them.  At 35 yards elevation was spot on, much to my delight! Windage needed correction of 6 clicks. I can live with that๐Ÿ˜‰.

    It's held up superbly for over 100 shots, and I hope it continues to do so into the thousands. We shall see! 

     

     

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    Mossonarock
    Participant
    Member

    Prior to the pandemic I too was looking for a side-lever .20 cal. I'm living vicariously through your post here. Thanks for sharing.

    yeah decocking a Diana side-lever is an experience best avoided. I just put a pellet in it and shoot it.

    I wish I had 65yds range in my backyard. I'm pretty much limited to 35yds. Trees and hills will do that. but thats why springers suit me so well.

    Also, good job on connecting the D.O.T.S. there!  (couldn't resist)

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    Scp52
    Participant
    Member

    Mossonarock

    Prior to the pandemic I too was looking for a side-lever .20 cal. I'm living vicariously through your post here. Thanks for sharing.

    yeah decocking a Diana side-lever is an experience best avoided. I just put a pellet in it and shoot it.

    I wish I had 65yds range in my backyard. I'm pretty much limited to 35yds. Trees and hills will do that. but thats why springers suit me so well.

    Also, good job on connecting the D.O.T.S. there!  (couldn't resist)

    You could always talk to Hector, he may still have a couple of those custom D54 .20's on a shelf somewhere. You might wanna have a fairly hefty bank account before you do as I believe they're a lot on the pricey side. 

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    JohnnyPiston
    Participant
    Member

    LDamm

    Very interesting project Jon, Thanks again for sharing.

    Thanks for your comment Larry, it makes the sharing the experience worthwhile.

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    JohnnyPiston
    Participant
    Member

    Mossonarock

    Prior to the pandemic I too was looking for a side-lever .20 cal. I'm living vicariously through your post here. Thanks for sharing.

    yeah decocking a Diana side-lever is an experience best avoided. I just put a pellet in it and shoot it.

    I wish I had 65yds range in my backyard. I'm pretty much limited to 35yds. Trees and hills will do that. but thats why springers suit me so well.

    Also, good job on connecting the D.O.T.S. there!  (couldn't resist)

    Speaking of the pandemic…or 2020 in general…Prior to it I'd have never imagined owning a RWS/Diana sidelever. Things change, opportunites were presented and I'm glad that my spring gun experience now includes these rifles. After my first shots with D48 .20 #1 (in first post of this thread) I remember thinking how well the powerplant of this rifle was developed. 28mm bore, long stroke for easy power, piston weight "as is" capable of magnum power, relatively easy cocking effort , short & centrally located transfer port…

    Of course there are some designing shortcomings; the play of the piston stem rod that some complain of and the barrel shroud that is prone to becoming loose and rotating around the barrel sleeve liner… I can live with the some of the plastic parts used.

    Thanks!

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