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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 edge barrel lenght?
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 458653" data-attributes="member: 505"><p>The big 338's gain very little velocity with barrel length. I did quite a bit of testing on it with barrels from 26"-34" several years ago. 18-23 fps or so on average per inch. That is why for a hunting carry rifle the shorter stiffer barrels are popular. If you don't have to carry this rifle up and down hills then go with the longer tube, no need not to. But if it is a carry rifle go lighter. The accuracy loads in my rem 700 338 RUM with a 26" barrel are in the 2700's with the 300 grain smk. Can push them into the 2800's with no problem but go with where the accuracy is. My two 26" 338 Lapuas shoot the 300 smk in the high 2800's with best accuracy. They are carry rifles and I saw no need to up the velocity a few fps and handicap me with the longer barrels. My two 338-300 RUM's I built back in 1998 have 28" barrels and shoot the 300 smk around 2800 fps with best accuracy. They are not that much heavier but I didn't gain much velocity either. You are just not going to gain much with the extra barrel length so go with what suits your needs the best. I have built many 338-300 RUM's, 338 RUM's and 338 Lapuas since the 90's with 26-30 inch barrels. All of them have best accuracy in about the same fps range with some shorter barrels actually having faster accuracy loads than the longer ones. Basically whether you get a fast barrel or a slow one will make more difference than barrel length. If you go to a 34" class barrel then you will start to notice a seperation from the shorter barrels. But from 26-30 inches not going to see much. All things being equal maybe 80 fps.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 458653, member: 505"] The big 338's gain very little velocity with barrel length. I did quite a bit of testing on it with barrels from 26"-34" several years ago. 18-23 fps or so on average per inch. That is why for a hunting carry rifle the shorter stiffer barrels are popular. If you don't have to carry this rifle up and down hills then go with the longer tube, no need not to. But if it is a carry rifle go lighter. The accuracy loads in my rem 700 338 RUM with a 26" barrel are in the 2700's with the 300 grain smk. Can push them into the 2800's with no problem but go with where the accuracy is. My two 26" 338 Lapuas shoot the 300 smk in the high 2800's with best accuracy. They are carry rifles and I saw no need to up the velocity a few fps and handicap me with the longer barrels. My two 338-300 RUM's I built back in 1998 have 28" barrels and shoot the 300 smk around 2800 fps with best accuracy. They are not that much heavier but I didn't gain much velocity either. You are just not going to gain much with the extra barrel length so go with what suits your needs the best. I have built many 338-300 RUM's, 338 RUM's and 338 Lapuas since the 90's with 26-30 inch barrels. All of them have best accuracy in about the same fps range with some shorter barrels actually having faster accuracy loads than the longer ones. Basically whether you get a fast barrel or a slow one will make more difference than barrel length. If you go to a 34" class barrel then you will start to notice a seperation from the shorter barrels. But from 26-30 inches not going to see much. All things being equal maybe 80 fps. [/QUOTE]
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