Crossman Custom 1300KT
Ordered a custom 1300 KT .22 caliber Crossman 1322 Classic Pistol today . Having it made into a short barrel carbine rifle .
Here are the components : (1) 1300 KT Custom Gun Base , (2) 1300 KT Base Assembly , (3) 14.6″ Lothar Walther Barrel in
.22 caliber , (4) Long Steel Breech , (5) Black Muzzle Break , (6) Black Plastic Shoulder Stock and Forearm Grip , (7) Blue
Trigger Shoe , (8) 1×25 mm Center Point Multi-Tac Red/Green Dot Sight . With a $10.00 Life Warranty it came to a total
cost of $262.53 . Should be a fun little gun to play around with . I will mostly use it to kill all the crows and pigeons at my
Daughters’ house . Have to wait 3 to 6 weeks for its arrival . :5:
FROM : THE BIRDMAN
All Replies
bogman , found the right contact for the upgrades needed to increase my ftp’s on my Crosman Pump Carbine . Alchemy AirWerks for Crosman
custom up-grade parts . Found out that the flat valve was for the CO2 carbine and that the Boss +25% transfer port really wasn’t needed for
a 14.5″ barrel gun , only if I had a 24″ barrel . Ordered a round nose valve that has the port vent drilled out for my type of gun which will work
with my stock piston and add about 115 ftp’s alone . Also have on order a Magnum hammer spring , really won’t know how much total ftp’s both
up-grades will do to my gun until installed and chronied . Ordered extra butt stock and forearm pump grip , going to try to see if I can modify
these two components to conform to the design that I really want my gun to operate and look like . If one or both work out , Alchemy AirWerks
said that they would like me to send them a picture and then go from there . Also , because this gun uses a valve with compressed air just like
the higher air compressed PCP guns I’am going to put an LDC on it , which should help with any gun report . I bought a longer bolt from Magnum
Airpower and it really made a big difference in pellet cycling from the small stock bolt that Crosman puts on their gun . With so many ways that
others have improved this gun , I wonder why Crosman just sits on their ass and still just puts out the same so-so product ? If they installed these
up-grades themselves they would have a much better product to sell to the public and sell a better gun for pesting . :whistle: :whistle:
FROM : THE BIRDMAN
You might try posting a “wanted…” in the Machinist section of this forum. Can’t hurt. There are some talented folks lurking around TAG.
bogman , it requires some one with machining skills : (1) replace plastic piston with one made from 3030 aluminum grade tubing ,
(2) replace hammer spring with a heavier hammer spring (that’s the easy part) , (3) replace the plastic piston cup with a harder
cup made from aluminum , (4) machine down the cone point of the valve until flat just above the o-ring and enlarge the port hole
on the valve so a Boss 25 % increase port can be inserted . I do not have the skills to make these mods , will need to find some one
who knows how to work on this type of mods for this gun . I’ve been looking around and it seems like all of the Old Timers that did
mods have given up working on this gun or have passed away . All I can do for now is to keep on searching and just enjoy shooting
this little shooter as-is . So far with-in 10 yards I have killed 2 pigeons on my daughters’ roof . :4:
FROM : THE BIRDMAN
Until any custom changes are made, trying lighter pellets, made of softer lead/ more pure, and thinner skirts should get faster results. Notice the heavier JSBs were going faster than CPs at 10 pumps. Since the lower fps guns don’t slam the pellet and expand the skirt to tightly fit the barrel, a thin skirt should help. Might be worth trying a lighter JSB, like the JSB Match Diabolo Exact Jumbo RS, which is 13.43 grains.
900+ fps sounds like a lot; that must require a complete rebuild!
bogman , you are correct between 8 and 10 pumps fps increase is small . This being a low fps gun I was only wondering how heavy
a pellet and far this gun would be able to kill pests . I have read on You Tube that those who have the skills have modified this gun
to be able to increase the fps from 450 up to around 910 fps and hit targets out to 125 yards . I sure would like to find someone who
has the skills and modify my gun to be able to shoot at least up to 650 fps if not even more fps . For such a low power made gun I was
surprised how well the trigger is , on my gun it has a very nice slow pull and it makes shooting this gun fun . Pumping is stiff and the
forearm grip is almost to narrow to grip for my hands which are medium in size , will have to modify and make the grip wider . 😉
FROM : THE BIRDMAN
PM sent.
Interesting numbers you got chronied. Looks like, after eight pumps, you don’t get a lot of fps increase. That’s probably why my “repair guru” told me to stop at eight.
H&N field Target Trophy might also be a good pellet to try, 14.66 gr. The Beeman Silver Bears, 12.65 gr., may not be in production anymore. But the H&N Excite Hollowpoints, 13 gr. are very similar.
I use the Field Target Trophys a lot in my springers. They have better long-range accuracy in those.
bogman , tried to send you a PM but for some reason it isn’t going through . Send me a PM with your cell phone number or an E-mail
address and I can send you pictures , and I’ll be able to send you my home address as well .
FROM : THE BIRDMAN
CHRONY RESULTS :
14.3 gr. Crosman Premier – PUMPS (10) 449 fps , (9) 456 fps , (8) 433 fps , (7) 413 fps , (6) 393 fps , (5) 365 fps , (4) 329 fps , (3) 284 fps
15.89 gr. JSB Exact Jumbo -PUMPS (10) 455 fps , (9) 442 fps , (8) 441 fps , (7) 410 fps , (6) 389 fps , (5) 362 fps , (4) 336 fps , (3) 294 fps
27.01 gr. H&N Sport Magnum II – PUMPS (10) 343 fps , (9) 326 fps , (8) 309 fps , (7) 298 fps , (6) 275 fps , (5) 224 fps
28.5 gr. Eunjin – PUMPS (10) 346 fps , (9) 335 fps , (8) 302 fps (7) 300 fps , (6) 287 fps , (5) 267 fps .
FROM : THE BIRDMAN
I wonder how it does with a rest. For short-range hunting, I had very good results with Silver Bear pellets, a semi-wadcutter hollow point which is pretty light. Those flew fast and deformed well. I hunted a lot of squirrels with those. Often, the round-nosed pellets didn’t drop the rodents, not quite enough power to deform. I think I’ve got a bunch of those in .22; I can mail you some to try out, if you’d like.
My old Crosman pump did best with about 7 pumps. If you have a chrony, it would be interesting to see how the fps changes with each pump, below 10, of course.
Can you post some pictures?
Thanks!
What I’d like to know is this: If a single-cock spring piston air gun, like a magnum RWS 48, can generate enough air to really get a .22 moving, why can’t a single pump (e.g. side lever) air gun store the compressed air instead of having the spring piston setup?
Well my custom Crosman 1300 KT pump .22 caliber carbine came on Tuesday of this week and upon opening the box my first impression
was good . The gun was shipped in a double box and was placed between 2 thick egg carton foam pads along with the Center Point sight
that I had ordered with it . It looked small and cute . Total length is 31 1/4 inches and with scope weights in at 6.67 lbs. Keep in mind that
this is only a 6 ftp gun without any mods done to it as of yet . Crosman states that this gun was design to best shoot Crosman and Benjamin
pellets . They also say that when not in use , the gun should have an empty pump charge . The gun needs to have at least 3 pump charges
to prevent the pellet from jamming in the barrel and to prevent damage to the gun must not ever be pumped more than 10 times per shot .
On You Tube they say that when not in use the gun should have 1 pump charge in order to keep a proper valve seal . I zeroed the scope in
at 20 yds. shooting Crosman 14.3 gr. Premier pellets . Shooting free hand a 5 shot group could be covered with a quarter . I also shot 5 groups
with JSB Exact Jumbo Diabolo 15.89 gr. pellets , H&N Sport Rabbit Magnum II 27.01 gr. pellets and Eunjin 28.5 gr. pellets . All pellets shot
just as well as the Crosman pellets . I set up 4 16 oz. water bottles at 20 yards to simulate the size of a pigeon . Shot 1 bottle per pellet
grain each . All 4 grain pellets went through each bottle and into my 4×4 back stop . Friday morning I took this little shooter which I have
named GOTH to my daughters house to see if it could kill the pigeons and crows at short range that sit on her roof that are not spooked
by anyone looking at them . Saw 1 pigeon sitting on the roof , so I put Goth to work . Yep , at about 7 yds. away I sent 1 pigeon to the big
pigeon coop in the sky . So far , I like this little shooter . :5: :8:
FROM : THE BIRDMAN
Got an E-Mail from Crosman today that my custom 1300KT carbine GOTH in .22 caliber has been shipped and is now on its’ way to me . Ordered
the gun on 11/12/17 and had to wait for the new Walther barrels to come in and be machined . Barrel is 14.5″ long with 12 lands and groves
rifling and with 1 in 16″ twist , is also crowned and chocked . Have 400 Premier 14.3gr. , 500 15.89gr. ,200 H&N 27.01gr. , 125 EJ 28.5gr. , and
250 Diabolo Exact Jumbo Express pellets from the Czech Republic which did not list its’ gr. size .
FROM : THEBIRDMAN
birdman yes I made the dumb looking ldc lol. Like I said I just put it together. Right now working on finding a hammer spring.
i had this barrel on a disco tube it was accurate with most pellets shot through it. I don’t expect accuracy to be any worse with the pumper. Just way slower velocities with a heavy pellet. I picked up some h&n excite 13g hp hope I can get them shooting 500+ fps in 10 pumps.
miksatx , did you make that LDC for your gun ? Looks to be at least 9 inches long . What pellet grain has the
best performance in accuracy and what is your max effective shooting distance ?
FROM : THE BIRDMAN
Lol maybe not a 1300KT but I’ve dabbled around with my backpacker. Multi shot .177 LW 18″ barrel prod trigger group. Brass flatface valve and piston.
Just put together a steel breech on a 1/4″ riser 13″ LW .22 backpacker still working on finding a hammer spring.
- You must be logged in to reply to this topic.
Cool! That’s quite the lineup of mods. It’d be good to hear the final report, when it’s done.
If Crosman powered up their guns, they’d appeal to the hunters and pesters, but I’m guessing their main market is to plinkers and back yard target shooters. They could offer different versions/setups, but that’d cost ’em.