February 26, 2015 at 1:29 pm #220241
“miller” lol…. used the specs of the Nosler exstreme 357 bullet that Crosman/benjamin is pushing for this gun.
(though not sure of the length for this round) which makes a big difference on your twist rate….
correction***** Nosler Exstreme is .75″ longFebruary 26, 2015 at 5:22 pm #220249quote RONIN001:
Caliber 0.357 Inches
Bullet Weight 145 Grains
Bullet Length 0.75 Inches***
Barrel Twist 14 Inches/turn
muzzle velocity 800 fps
Temperature 80 degrees Fahrenheit (59 is standard)
Pressure 29.92 inches of mercury (29.92 is standard)
Sg = 3.75 just under the over Stabalization… I guess
Sg shouldn’t be less than 1.4. If Sg is greater than 2.0 or large cal handgun 4.0, you may
gain some accuracy by going to a slower twist barrel.February 26, 2015 at 8:30 pm #220272
Lighter pellets are shorter and require even less twist. That’s why Korean guns with short magazines use 20:1 twist rate. With pellets you can go even lower in twist as they are partially drag stabilized in fly.February 27, 2015 at 6:25 pm #220378
OPENING OF THE BULLDOG…. SORRY IMAGES TAKEN WITH C.PH NOT THE BEST
From what I found out pellets most likely will not work out so well with this twist rate along with most of the 357 bullets out there (they are not long enough) Hope someone can prove this wrong… For now all I have is JSBs and 100 rounds of $$$$ Noslers
With JSBs 357 pellets you may be pushing into the 1100fps range
PS this gun is at least Pyramid Air sound level 4February 27, 2015 at 7:11 pm #220385
Can’t wait to see some accuracy results and some crony #’s and shot count. If this gun does what is says I will have to get one if the accuracy is there too.February 27, 2015 at 7:29 pm #220387
Not a lighter “pellet”, but a lighter lead slug? A hollowpoint can trim a LOT of weight off of that .357, maintain it’s length, and get the fps up to speed without sacrificing any appreciable FPE…
I know they are available out there in several different weights. That poly tip isn’t all that great at air gun speeds. A common hollow point, or solid slug should do just fine for the game we hunt and the ranges we shoot! Get that slug down to 90 to 100gr and then take a look at performance.
This gun has possibilities, but Crosman couldn’t release a product properly if they tried. We don’t hunt African animals and I sure as hell wouldn’t take an airgun to Africa!!! We don’t need that big and complicated a slug! That’s horseshit product marketing for Nosler and removes the true potential from the Bulldog. Give the gun the right ammo and I’ll bet it will perform with excellence.
Hoot:February 28, 2015 at 4:12 pm #220509
Typo, I meant lighter bullet but same principle applies for pellets. Lighter = shorter (in general). A HP will shave off few grains but it will not provide massive changes in weight. It also moves the bullet’s mass towards the rear which is really bad if the bullet is marginally stabilized. So,choose the twist rate to match the longest bullet you are going to be shooting. If I had a Bulldog I’d be trying Bob’s boattails, 109 and 124 grain versions exist. The 109 grain should fly around 900 fps and with reduced drag of boattal it will fly as flat in longer ranges as a lighter flat base bullet while retaining more energy.February 28, 2015 at 6:47 pm #220532
Agree, I would test bullets in the 95-110gr rangeFebruary 28, 2015 at 8:33 pm #220543
stubby bullets may not work with this gun I believe you will need at least .6″ – .75″ length bullets to get beyond 40yrds (could be very wrong)
– I talked with Bob from Mrhollowpoints he siad he was going to test his ammo on it when his bulldog comes in.
– Matt’s bullets: Waiting on length information on his 357 ammo but no reply from him this week.February 28, 2015 at 9:03 pm #220548
So my ammo I order from Pyramyd Air is going to someone else it seems… :rofl:
I just received my delivery from FedEx (well someones delivery) as you can guess its not ammo instead it was my first BB gun that I saved all my pennies as a kid “2100 Crosman Classic”. A little disapointed about no ammo but it did bring back some good old memories!! 😀
SORRY FOLKS NO SHOOTING THIS WEEKEND…. 😥February 28, 2015 at 9:05 pm #220549quote RONIN001:
I don’t know, …but I think twist is a bit overrated,
in any case if the gun is limited to heavy bullets to be shot at 700 fps than I think sales will suffer.February 28, 2015 at 9:37 pm #220550February 28, 2015 at 10:31 pm #220555
If that is really the case,…….than they’ve screwed up, again !February 28, 2015 at 10:54 pm #220559
hootParticipantquote Nomadic Pirate:
Let’s not forget that barrel is easily replaced with one of your choice. It’s not a premium barrel. More than one machinist on these forums will get you the twist you want and cut the blank to fit! That might be a good investment in this case.
Hoot:February 28, 2015 at 11:17 pm #220561
Yeah, but changing barrels isn’t all that cheap, now we are looking to had about 300 bucks between barrel and fitting,…the gun start to become awfully expensive.
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