Currently it's the Beeman RX-2 at 1125 FPS in a .177 pellet
It depends on the model and the condition of the RIFLE.
The Beeman R-10 was made between 1986-1995. It came in .177, .20 and .22 caliber models. There was also a Deluxe model a Laser model a Custom walnut stock model a Left handed model and a RDB version. In Excellent condition (It Must be like NEW) it is worth between $325-$400. It was made in Germany. At one time Beeman was known for high quality rifles and they held there price. But lately some of the models have been made outside Germany and this is reflected in the quality. Fortunately your is an older model and still holds it's value. Source "Bluebook of airguns"
Beeman makes several good air rifles & guns. I know of 3 different "Sportsman SS" series that shoot .177 pellets And the RS1 Sportsman that comes with 2 barrels .177 & 22. But I know of no Beeman Air Gun called Sportsman. Just the Sportsman Rifle. If you are talking about the RS1, then yes I would have to say it is a good rifle for the price.
The Beeman R-10 was made between 1986-1995. It came in .177, .20 and .22 caliber models. There was also a Deluxe model, a Laser model, a Custom walnut stock model, a Left handed model, and a RDB version. You didn't state the condition of the rifle, so no estimate of value and be given. Is it in Excellent, Very good, Good, Fair or Poor condition? Also what model is it? Give more information and re-post the question and I'll try to give you an estimate.
It shouldn't be a problem. In fact Beeman and a few other companies make dual caliber rifles , Interchangeable barrels in .177 and .22, for some of there models.
Between $300 an $395 add $30 for the scope. Add 25% for R10 deluxe model with hand checkered grip, white lined grip cap & Butplate. Add 110% for extra fancy walnut stock.
Yes it can provided you can find the .22 barrel. Beeman makes a dual barrel .177 & .22 rifle
Model 317 was made between 1940 to 1969. Unfortunately you did not state the condition of the rifle so no estimate of value can be given.
This is a .177 pellet rifle.
You mean What is the best PELLETS for an air rifle. This all depends on the current rifle you own. You can not use .22 caliber pellets in a .177 caliber rifle or vise versa. As for individual calibers them it's really up to you. .177 is more common, but I prefer the .22 because it is larger and has more knock down power. I even own a .25 caliber for hunting. Match rifles use .177 caliber But unless you plan to own a $600 to $2000 match air rifle I wouldn't lets that influence me to select a .177. As the calibers get bigger the pellets get bigger. Bigger pellets fly slower but fly straighter and hit harder. .177 pellets travel very fast but are more influenced by crosswind. Beeman actually makes a interchangeable barrel rifle, one is .177 and the other is .22. It's the model RS2 at around $135 it's gives you the choice of both barrels. I'm not trying to sell you on it just letting you know what is available.
The model 100 is a .177 caliber air rifle. The model 101 is a .22 Caliber rifle. Basically the same air rifle just different calibers.