Your Rugers poor performance is possibly due to the rifle bouncing away from the hard surface of your shooting box.
An old towel, laid across the box... even folded over several times, isnt enough padding to keep your rifle from bouncing away from the shooting box when it is fired. Rifles always "bounce away" from hard surfaces from which they're fired.
Naturally, when it bounces away from the shooting box, it sprays its rounds all over the target.
The rifle rest and the sandbags, ALONE, should hold the scopes crosshairs perfectly ON the bullseye without your aid. Shooting right handed, I hold the rifles forearm in my left hand which is laying on the sandbag in the rifle rests cradle. My hand provides additional cushioning and a more realistic result since my hand will be holding the rifles forearm in exactly the same manner in the field.
I use the other two sandbags under the toe of the stock to steady it... and I use the last, smaller sandbag to move up or down the base of the stock between the stock and the larger sandbags to make the rifle as solid as possible so that the scope's crosshairs are held EXACTLY on the center of the bullseye without any aid from my hands. In this way, I can best determine which "load" is most accurate in my rifle.
Naturally, my hand will NOT be resting on a rifle rest and sandbag in the field, but my gloved hand may be resting against a tree or over a stump while cradled in my hand which will be providing the cushion necessary to keep the rifle from bouncing away from the rest.
When shooting in the field at game, ALWAYS try your utmost to have your rifle rested against something solid if possible
with your hand in-between the rifle and the solid rest, of COURSE. The least accurate shooting position is off-hand without a rest.
The same thing would happen in the field if you laid your rifle across a tree branch to steady your rifle just prior to the shot. You must always have plenty of cushioning (like a semi-soft sandbag or your hand
and a gloved hand is better) between the hard surface of the rifle's fore-stock and the solid surface youre laying it on to steady it to the shot. Failure to assure a solid, but soft rest leads to inconsistent groups.
Ive been very satisfied shooting off the bench rest using a large, cast aluminum rifle rest that has an adjustable cradle together with 3 large (25 lb. shot-bags) sandbags and one small (made using a 5 lb. shot-bag) made from old shot-bags I filled with clean, dry sand, folded the end of the shot-bag over a few times, then hand-sewed them thoroughly shut
leaving a little extra room inside the bag so the sandbag wasnt hard, but had give to the sand bag.
I dont remember what the rifle rest cost
bought it many, many years ago
but you can probably get one today for around $30 or $40. I lay one large sandbag on the cradle of the cast aluminum (with screw adjustments on the neck of the cradle as well as each leg of the rifle rest)
and put the other two large sandbags under the toe of the rifles stock.
Then I use the small sandbag between the two larger sandbags and the bottom of the stock to give me the final adjustment as I look through the rifles scope at the target. Once everything is solid and the scopes crosshairs on perfectly centered on the targets bullseye
and nothing is moving, I take a deep breath & let it out, then another deep breath and VERY SLOWLY let it HALF out while beginning the squeeze on the trigger. Usually the shot fires before I get down to a half breath.
I use this method to work up my hunting loads because this method works for me and gives me the best 3-shot groups my rifles are capable of shooting.
I often work up my loads by firing at a target only 50 yards away since a 3x.-9x hunting scope doesnt have enough magnification (for me, anyway) to clearly see the small bright orange target dot at 100 yards. Since the purpose of working up the highest velocity load consistent with the most accurate load which eventually becomes ones hunting load, you can only shoot as accurately as you can see.
Therefore, I work up my loads at 50 yards, then once my hunting load is determined, I re-sight in my most accurate "load" in at 100 yards using my ballistic program to determine how high I want the group to be at 100 yards in order to give any particular load and rifle its maximum point-blank range.
Most high-velocity rifles point-blank range will fall between the 240 to 300 yard range depending on the rifles velocity and bullet weight. As example, my .300 Savage handloads using 150 grain Nosler Ballistic Tip Bullets @ 2675 fps has a point-blank range of approximately 260 yards. This means I can hold dead on the target from the rifles muzzle out to 260 yards and the bullets line of flight will never be more than 3 inches above or 3 inches below my line-of-sight. This insures that if I do my job in aiming my rifle in the center of the kill zone, the bullet will hit the game animal within 3 inches ± of the center of the kill zone. Since all kill zones on big game animals are at least 9 inches in diameter, such a shot should produce a humane one-shot-kill and almost instantaneous death.
Here is an example of my Savage Model 99 in .300 Savages exterior ballistics:
25 yards = + .05 inches
50 yards = +1.28 inches
75 yards = +2.19 inches
100 yards = +2.75 inches
125 yards = +2.98 inches
150 yards = +2.84 inches
175 yards = +2.30 inches
200 yards = +1.36 inches
225 yards = ± 0.00 inches
250 yards = - 1.79 inches
260 yards = - 2.64 inches
270 yards = -3.55 inches
As you can see from these calculations, my rifle has a point-blank range of a almost 270 yards if sighted in 2.75 inches high at 100 yards.
You can also buy pre-shaped shooting bags that will help steady your rifle when shooting from the bench rest.
Strength & Honor
Ron T.