The Shinsung Career 707 9mm Ultra – Part 2
by B.B. Pelletier
Update on Tom/B.B.: Tom had some Jello and drank some water on Tuesday afternoon. On Wednesday, he’ll have a low-fat liquid diet. They think that on Thursday, if all continues to go well, he might be able to have a low-fat regular diet. He was able to get out of bed twice. Things are definitely looking up!
Now, on to today’s blog. This is the second installment about the Shinsung Career 707 9mm Ultra.
The Ultra is large. Although it looks a lot like a regular Career 707, it’s 20-25 percent larger in every dimension but length. The action is thicker, the stock is beefier and the weight is over 10 lbs., compared to the 707’s 7.5 lbs. The pull is 13.75 inches, which is about normal for a sporting rifle but longer than a Career’s. The overall length is a compact 42 inches, which adds something to the feeling of bulk, because it concentrates the weight.
Another part of the bigness is the huge reservoir on the Ultra. Where the twin tubes of a Career 707 measure 0.943 inches OD on my calipers, the Ultra reservoirs measure 1.103 inches across! That may look like a small difference on paper, but it is, in fact, a whopping big difference. The tube walls are thicker, which accounts for some of the extra weight, but they also hold a lot more air! Where eight pump strokes raise reservoir pressure 100 psi on a Career, I found it took 13-14 pump strokes to do the same on the Ultra. Yes sir, this is a big air rifle!
The Ultra’s power wheel. While some guns have adjustable power and some guns having repeating mechanisms, there are only a few that have both. The Ultra is one of them.
Power to spare!
The rifle features adjustable power via the same power adjustment wheel Career owners have come to love.
Note: The only ammo that currently works in the Ultra is the 77.8-grain Eun Jin pellet. Since I wrote this article, I discovered that all other 9mm pellets cause problems.
On the lowest setting, I shot a single 60-grain pellet, at 181 f.p.s. Six clicks (about 1/3) up netted me 40 shots at an average 736 f.p.s., with a 12 foot-second spread. But high power is what everyone wants, so let’s look.
Muzzle 8′ from start screen, 10 shots, 85 deg. F
.356 caliber Korean pellets, 58.3 grains
Low …..928 f.p.s.
Extreme spread …..38 f.p.s.
Standard deviation…..9 f.p.s.
Muzzle energy…..114.90 ft.-lbs.
.356-caliber Pellet Man bullets, 90.1 grains
Low …..801 f.p.s.
Extreme spread …..49 f.p.s.
Standard deviation…..14 f.p.s.
Muzzle energy…..138.86 ft.-lbs.
.356-caliber Pellet Man bullets, 114.2 grains
Low …..715 f.p.s.
Extreme spread …..29 f.p.s.
Standard deviation…..11 f.p.s.
Muzzle energy…..134.43 ft.-lbs.
Although I tested 3 other pellets, the ones that now perform flawlessly are the 77.8-grain Eun Jins.
I made a serious mistake the first time out with the rifle. The power wheel stuck at six clicks up from the bottom, so I assumed that was full power. The rifle is very accurate with pellets at that level and there are more than 40 shots available per charge, but it’s well below the power limit of the rifle.
Crank her up to the top (19 clicks), and it’s rock ‘n’ roll time! Both Pellet Man bullets were accurate, but I preferred the 90-grain 3/4 roundnose bullets best of all. They packed the biggest punch, plus they fed into the bore better than the 115-grain bullets, which seemed to stick as the lever pushed them home. Because of that, there was a kickback through the lever whenever the heaviest bullets were shot.
Seven pellets fit into the magazine, as the nose of one fits into the hollow tail of the one in front of it. With 90-grain bullets, you get five shots per magazine and with 115-grainers, four.
Pellet Man also makes both 90- and 115 -grain hollowpoint bullets that hunters will want to try. At the power level demonstrated, the Ultra would be perfect for coyote, nutria and woodchuck if the range is reasonable. For rabbits and squirrels, dial down the power and use the pellet for less penetration and less meat loss.
One final comment about ammunition. There’s a loading port on the right side of the receiver the same as is found on the Career 707 rifle. But on the Ultra, the port is too short to accept even the 90-grain bullet, so it isn’t very useful. About all you can do with this port is set up the magazine to feed 90-grain bullets and feed pellets through the port, since they alone will fit.
At first, I shot the rifle with open sights, which are more than adequate on this gun. The rear sight adjusts for both windage and elevation, though the elevation took a moment to figure out. The rear screw on top of the sight is screwed down to raise the sight (and the strike of the round) and backed out to lower it. It seems strange at first, but it works perfectly.
At 10 meters, I got one small hole with the 60-grain pellets, which were the ones I chose to sight-in the rifle. It put them at approximately the point of aim at that close distance, which put them about the same point or a little higher at 35 yards. That sight picture also served for the 90-grain bullets, though they were off about two inches to the left and somewhat lower on the target.
The pellets gave good groups of just over an inch with open sights. But once I was on target at 45 yards, I mounted a 4x Beeman SS2 scope to continue testing.
At 45 yards, five 60-grain pellets went into this nice group measuring 0.882″ c-t-c. 90-grain bullets went about an inch at this range. The rifle is just as accurate with pellets down to 750 fps, which conserves air for many shots.
As it turned out, the rifle gave results at 45 yards that were just a little larger than at 10 meters. At 45 yards, five pellets sailed through a group measuring 0.882 inches c-t-c, while at 10 meters the group was 0.552″. Both groups were shot with a scoped rifle.
With 90-grain solid bullets, the group opened up to about 1 inch at 45 yards, but I’m not sure that’s the best it can do. I felt the rifle might have shot tighter groups with a more powerful scope; but since I had to dismount the scope each time I changed ammunition (to remove and install the pellet stop) and re-zero after each change, I used the SS2 for time’s sake. If I were going to hunt with an Ultra, I’d select one projectile, then mount a more powerful scope.
There aren’t many repeating big bore airguns in the world as of this report–certainly not modern ones, anyway. The 9mm Ultra offers the same power and accuracy as the single-shot. If you want a repeater, this is the rifle to get.
Add to that the great number of shots you get from a single fill of the gun–at least 40 or more on 1/3 power! The major differences between the Ultra and the single-shot seem to be the repeating function, the power adjustment and the size of the gun.