Until this post about 30gr. Piledriver .22 "pellets"(although they are more like slugs),I'd not given one rifle enough of a chance with the picturted heavy weights in an above post.Tonight,I gave them a quick test in the one rifle that did shoot the odd-ball RatCatcher II's (also a close nephew of a "slug") a good showing,.Although not agreeing in POI/POAfrom where I left the rifle...and is not that why they have those scope knobs that go "click"... If I settle one one, wouldn't be a major effort to turn those knobs "click click" to get the "choosen one" on target.Likely, will settle on the "orphan" Rabbit Mag II ellets,as I have enough of them one had to keepon going, and nothing else rea;u tolerates them. few scope clicks "up["should do it.ANYWAY...the main thing here is that, at least in .22, it's not barrel twist. Shortest to longest projectile, they shot pretty much the same (OK...a Ratt'sarse"of difference at best). The Piledriver .22 shot almost unuseable in this rifle.(OK...that'sBS...I'dcount the unprictiablity as "useless"in this PCP. Got smooth borew that can manage better than 5-5./5MOA)YOUR rifle can certainly vary....but it'snot twist rate...it'snot velocity/energy...it'[sjust the luck of the draw for barrel size/Piledriver fit.B U T....in the avovce example,even though the BC is greater,and the down range energy is greater...does any of that make a "ratsrump" considering the accuracy?
Really have to blame "fit" over "twist". Found several PCP'sthat would shoot longer/heavier pellets or slugs that just won't shoot the shorter Piledrivers.If twist werte the problem with the stumpy piledrivers,then the even longer/heavier pellets would have shot worse.So barrel twist in the .22 Piledriver version isn't the accuracy issue.Some (at least the ones I have left) of the .22 Heavy weights (had more that were uninspiring,but luckly found a way to use them up):Something like 7 or 8 test rifles (more than 1/2 borrowed rather than onwned.MIGHT BE that my stadards for "good shooting"are too high...they all shot...could pretty wellpredict what pattern they'dform on paper....just a judgement on my part that the pattern was too big?A. 25.6gr. RatCatcher II. NOTHING loved them./...Nothing even really "liked" them...one unexpected rifle (as it is only a 28-30 foot pound .22) at least tolerated them into groups well enough to use. I just haven't quite used all of them up.B. JSB 25.4gr. Almost every test PCP,low or high power, shot them well.C. Piledriver .30gr. HAven't found the right barrel for these...may never..who knows?D. JSB 34gr. ("old version"). Only two rifles that are fast enough tomake good use of them shoot them well.E. 34gr Cast/sized slug. Not an accident that this version ended up about the same weight/length as "D". Shot really well in one of the two rifles from "D",not so well in the other.So the question really is about fit. The solid (or nearly solid_ slug-tupe pellets are not going to be as forgiving of fit. The hollow based pellets are going to allow their hollow skirt endges to be compressed/swaged as chambered and fit the bore. For the slug-tupes to shoot well, they have to be just-right in size to pre-fit the bore just right.I just haven't found a bore that likes the Piledrivers.Guess that also relates to the old versions of thew JSB Heavy Wights (the MK I rather than the MK II versions)….lots of folks didn't get good accuracy from them (which resulted in the redesigned MK. II's)...so evidently the fit of the old version was somehow "right" for my rifles, but not "right" for others.
In the range of .22 heavy weights ... H&N barracuda 21.3's do very well at velocities approaching 1000 fps. Which is above 45 ft lb energy while being very accurate in at least LW barrels.It is my Go Too magnum .22 pellet shooting better than monster JSB's by a fair margin.JMO tho ...