It’s not a secret that heavier barrels give better and more repeatable accuracy. Bench rest shooters use either a heavy varmint or a light varmint contour barrel at around 20 inches overall length. This makes for a very rigid barrel, little barrel whip and vibration, hence the small groups. However the long range hunter does not have the option of having a short 20 inch barrel, and even the light varmint contour is too heavy to carry around mountain tops at high altitude. There has to be a compromise between weight and ability to carry. The Shilen number 5 contour is a popular choice but is a little on the light side for my personal liking. The Light Palma contour however is a perfect compromise. The Light Palma contour is heavier than the number five contour but lighter than the factory Remington varmint/Sendero profile.
There are countless numbers of Remington Sendero and varmint rifles in circulation. Until recently all of these rifles have worn HS Precision stocks which are factory inletted perfectly for the Light Palma contour, as are the new Bell and Carlson stocks. Not to exclude other manufacturers such as Savage and Winchester, whose heavy barreled rifles have a barrel channel big enough to carry the light contour without the extra cost of inletting.
My rifle is a Remington varmint rifle in 308. The factory barrel shot great and held accuracy for several thousand rounds before the throat eroded to the point that a round would not chamber. The gunsmith I took the rifle to asked me to try the Light Palma contour over the Remington varmint profile. This is advice I am glad I heeded -- weight savings of half a pound while giving up very little barrel stiffness, and as mentioned earlier no cost of stock inletting. Light Palma barrels are also heavy enough to flute for even more weight savings without sacrificing rigidity. Palma barrels come as 31 inch blanks so any hunting length is easily achieved. The chart below shows the measurements and weights of different barrel contours. The overall length of the Palma barrel depicts how big the barrel is at the muzzle due to its taper. My barrel measures .780” at the muzzle and a factory varmint measures .820”. Thirteen inches past the muzzle my barrel measures .880” and a factory varmint measures .885”. By these measurements it is easy to see the Palma barrel doesn’t really start to lose any size to the varmint contour until past the end of the stock.
This is the smallest five shot group to date, and with the 10x scope I doubt that I can do much better, but sub .5 moa groups are the normal for this rifle.
This picture shows that the barrel fits nicely in place of the varmint barrel, free floated but not too much gap on each side. Also as you can see in the picture that these groups were shot with heavy boat tail bullets, not the typical flat base bullets that short range BR shooters typically use in competition. The load shown here is higher than the Sierra manual suggests, so of course it cannot be assumed to be a safe load in other rifles, and I take no responsibility for someone duplicating this load.