When you roll, you get a random stat valued between 5-200 (I’ve never seen anything lower than 65) for one row.

You can have up to 5 rows, and each row can go up to 200.

BUT

Some rows might be the same stat. If you have 2 rows of Crit, then on the weapon, those numbers will appear as a single value.

In your weapon, your two rolls of SkS added up to 295. It was still 2 rows, but because they were the same stat, they show up on your weapon as one value.

If you keep rolling, you will eventually get more rows, up to a maximum of 5. You could potentially get up to 1000 in stats (200 x 5). It’s not very likely.

A “good” weapon will have around 800 or better total stat bonuses in stats you actually want.