10 grain & heavies in magnum springers?

[Zzyzx]

In looking at the heavier .177 pellets for the new Marauder that is coming I am wondering if they will do OK in a 350 Magnum springer? Or similar powered spring/gas ram rifles?

I am filling out the stable in .177 to complement the Diana Model 48 with the addition of the Marauder in that calibre. I have a very nice, recently purchased 350 magnum in .177. Having the option of shooting the same pellet in all the rifles would be nice, assuming all are accurate with the same pellet.(still to be determined) If so, it would be nice to have the bit heavier lead pellet nailing the birds and varmints.

Will this weight pellet work OK in a magnum rated rifle?

While at it, how about the 18-21 grain pellets in a .22 Calibre 350 magnum? Any problems with that one? I shoot them in the Evanix Blizzard(power turned down a bit) and have good success but would like to use them in the 350 Magnum as well. Considering its design and purpose will this weight do any harm or contribute to premature spring failure? The Blizzard shoots very well with the JSB Monsters, really knocks the critters down. It seems to like them better than the Eun Jins that are a bit heavier. For the blackbirds I am shooting the 18-21 grain pellets(JSB - and will try some others) to see if I can get it tweaked right to nail the feathered locusts with the lighter pellets.

[daved]

The magnum springers should be fine with the heavier pellets, but probably won't be as efficient.  The big issue with heavy pellets in springers is spring wire diameter, as long as the wire is over about .128", it shouldn't be a problem, regardless of caliber.

HOWEVER, just because it CAN shoot them without damage, doesn't mean it will shoot them well.  When I had a .22 350, it did very well with mid weight pellets, around 16 gr.  Predators were really good, and so were Superdomes IIRC.  I tried some Kodiaks, and it was really obvious the rifle did NOT like the heavier pellets.  Shot cycle got really rough, and the recoil got kind of vicious.  I also lost power, around 2.5 fpe.  

The same holds true with .177's in my experience.  I currently have 4 .177 springers, all have springs with wire at or over .128", so all will handle heavier pellets.  Although confident that I won't hurt anything shooting heavy pellets, I get more energy with the lighter pellets.  I'm going to qualify that by saying that's energy at the muzzle.  Although I haven't tested it directly, Chairgun says that the heavy pellet will have more energy down range, even though it starts off lower.  But if you zero your guns around 30 yards like I do, the difference with my TX shooting a JSB Express vs. a JSB Heavy is less than 1/2 fpe.  So I think I'll stay with the lighter pellets, if only because I get a flatter trajectory out of them.  Later.

Dave

[Rickster]

As far as weight goes, I think the rule of thumb,  is not to go above 9gr and 15gr unless you use a Magnum steel spring, a Gas-ram, PCP or Pumper.
My NPSS .177 shoots 8.66gr pellets the most efficiently, with 13.6fpe. The 10.5 CPHD is slower, and actually produces less FPE at the muzzle @ 12.4fpe.
My .177 M-rod loves CPHD 10.5 in the box, and I lube them with Wiscomb Honey. It shoots them right at 900fps without adjusting the gun.
It also shoots Barracuda Match and Benji HP's very well. It shoots RWS super domes good, if  I use the SS tray, because the clip shaves some lead off the thin skirts.

Congrats on the .177 Mrod Josh, I want to get a .22 Evanix like yours in the future.

Rick

[djmyers]

I shoot 10.2 gr jsb out of my 350 and hey are he most accurate and powerful. I do not shoot them out of any other gun though. I actually killed my gamo hunter with 10.65 gr pellets. I only shoot 8.4 gr out of it now. Heavy pellets in magnum rifles

[Magnum]

All though sort of pricey, I have had great success with the .177 Beeman FTS 8.8gr:) and the RWS supermags 9.3gr if up to about 25yds works great.

[tjk]

I'm much the opinion of Daved, save the highest weight I found in my .22. B-28A was the 18.? Cromags. And that was pushing the limit and drawing in the field some, but not really practical from a precision stand point in the hunt. Mine excells with regular old RWS SD's. I've found cheapo daisy wads to be devistating on close up targets! But in .177,....10.2 - 10.56? Should be OK. My other B won't shoot nothing lighter than the Baracudas. PCP,....I don't know that game,.....yet. LOLs, tjk

[Progun]

Josh, I'm currently trying to wear out a CDT tuned .177 350 mag by shooting 10.5 CP's. It shoots them smooth and accurate even after 4500 pellets .Velocity has decreased by about 50fps since it was a new gun but that should be expected with this many shots on any kind of spring.OEM or McCarri. Still about 18fpe after a lot of heavy for caliber mileage.