Why the tripod earns its weight
A tripod gives you a stable, height-adjustable support almost anywhere — over brush, on a slope, on pavement — in positions that would otherwise be offhand. For field and match shooting it has become the single most valuable accessory after the optic. It lets you take a standing shot that's steadier than most people's kneeling, and a kneeling/seated tripod position that rivals prone.
The trade is weight and setup time, and the fact that a tripod is only as good as your technique on it. A rifle simply clamped to a tripod and left to float is less stable than a good bag position, because the tripod head and legs flex and the rifle hangs off a single point. The technique is what makes it work.
Two ways to marry rifle and tripod
1. Clamp (ARCA/pic rail). The rifle's forend rail clamps directly into the tripod head. Rigid and precise; the rifle becomes part of the tripod. Best for deliberate shots and maximum stability. The downside is transition time — you're locked in until you unclamp.
2. Saddle / bag-on-head. A saddle bag (e.g. a "pig saddle" or a game-changer over the head) sits on the tripod and the rifle rests in it. Faster in and out, more forgiving, and you can load the rifle into it. Slightly less rigid than a hard clamp but more versatile, especially for moving between targets.
For most field and practical use, the loadable saddle method wins on speed and the ability to preload; the hard clamp wins for a single, deliberate, maximum-precision shot.
Loading the tripod
Just like a barricade, a tripod is loaded, not rested on. With a saddle, push the rifle forward/down into the bag and pull straight back into your shoulder so the whole system is under tension and the legs are slightly preloaded. With a clamp, you load by driving rearward into the rifle and managing the tripod's natural spring. A loaded tripod returns the reticle to target after recoil; an unloaded one lets the rifle bounce and hunt.
Manage your body, too: get your stance behind the rifle so recoil goes into your shoulder, not off to one side. In standing tripod, widen your feet and settle your weight; in kneeling/seated, get a leg or your body into the tripod for extra contact. The steadier your body, the steadier the rifle on top of it.
Leg setup and height
Splay the legs wide for a low, stable shot; bring them in and extend for height when you must see over something. The lowest height that lets you see the target is always the steadiest — don't stand the tripod tall out of habit. On a slope, adjust individual leg lengths to keep the head level. Lock the leg sections firmly; a loose section is a wobble you'll chase all day.
For standing tripod, get the head roughly at the height where you can drop your cheek onto the stock with a relaxed neck — straining your neck up or hunching down both add tremor. The rifle should come to you.