IZH MP 513M air rifle - Part 2
by B.B. Pelletier
In our last look at the IZH MP 513M air rifle, I noted several quirky design details on the gun. The safety, which works like an exposed hammer, is the biggest, but there are others.
Air transfer port seal
Another strange detail is the location of the seal for the air transfer port. On all other breakbarrel spring rifles that I can think of, the seal is on the breech surrounding the barrel. But on the 513M, it's located on the compression cylinder located behind the barrel. I don't suppose that it matters where it is, but it seems strange that only one air rifle would do it differently.
Scope mounting problems
This rifle has a dovetail base that accepts the scope rings. Instead of being cut into the cylinder, it stands proud of the gun, just like the RWS Diana springers. And, like them, the Russians have made poor provisions for a positive scope stop. I did the same thing as when I mounted the scope mount to the RWS Diana 54...I used a one-piece scope mount and hung the stop pin in front of the rifle's base. The 513M has a steel base instead of the aluminum one Diana uses. There are three small holes in the base, which I suppose are for a scope stop pin, but I've not see one small enough to fit them.
513M scope base has three holes for a scope stop pin, but all are too small. Hang the stop pin in front of the base, as you'd do for the RWS Diana rifles.
I used a Leapers 3-9x40 (model shown is obsolete) scope on the MP 513M.
The real problem was that the one-piece mount was so far forward on the gun that the scope eyepiece was also too far forward. It was difficult to get a good view of the target from so far back, so I had to shove my head forward on the stock.
The safety that acts like a hammer didn't prove to be a problem, as the photo shows. There was plenty of room under the scope to pull the safety back after cocking, and I soon found myself doing it as a habit. However, this "feature" is still an unusual one.
There's plenty of clearance to cock the safety.
I wondered how the trigger would feel when shooting for accuracy. Well, I found out. The two-stage behavior becomes almost single-stage when you shoot for real. That means the first stage is quickly taken up, but the second stage pulls through a long arc before releasing. It feels like a long single-stage trigger when you shoot for record. I found it heavy when I had to concentrate on the pull, probably because the trigger was moving all the time instead of breaking crisply.
The 513 is accurate enough to challenge any Gamo, except perhaps the CF-X. I did my testing at 30 yards on a calm day. Beeman Kodiaks grouped 0.807", and I would have stayed with them longer, except JSB Exact 10.2-grain pellets, which are nearly as heavy as the Kodiaks, shot almost twice as good - at just 0.458." Crosman Premier 7.9-grain pellets tantalized with groups ranging from 0.539" to 0.687", but within those groups most of the pellets went into much tighter groups. I tried and tried, but could never equal the groups of the JSB with the Premiers. So, JSBs won the day.
The best group came from JSB domes. It's less than one-half inch.
Crosman Premier 7.9 pellets grouped between a half-inch and six-tenths. In this group, however, four of the pellets are grouped in 0.149." Several groups teased like this, but none beat the JSBs.
The 513M is as powerful as I thought it would be. Crosman Premier 7.9-grain pellets averaged 934 f.p.s., with a total spread of just 7 f.p.s. JSB Exact domes averaged 826 f.p.s., with a spread of 11 f.p.s. Kodiaks averaged 803 f.p.s., with a total spread of 15 f.p.s. All of these numbers suggest a well-balanced powerplant. The cocking effort of 40 lbs. is about 5-8 lbs. heavier than other airguns need to achieve the same power; but if you don't mind it, the 513M is a good value.
JSB Exacts are clearly the best pellet for the rifle, being the most accurate and the most powerful at 15.46 foot-pounds. The rifle recoils heavily forward and vibrates a little. The heavy cocking effort became a strain after 100 shots. Still, at the price you'll pay, this is the best buy on the market. I would get the .22 and use it for hunting.