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Long Range Hunting & Shooting
Talk me out of a 300 rum
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<blockquote data-quote="jarnold37" data-source="post: 1947926" data-attributes="member: 29241"><p>I have two different reamers that I have used since before the 30-378 was offered as a factory chambering. Both of these reamers have no freebore. One is reamer is for small bullets and other is for heavier bullets. I have barrels with 14" twist and have shot 125's and 130's at 4000+ fps. This is a 26 lb gun and it has shot many 5 shot one ragged hole groups. I also qent to a 338-378 with a 2" BAT and 2" barrel in a 1000 yd heavy stock. This chamber also no free bore. 56 lbs and shoots 300 grain 2900 fps. Also chambered a 338LM IMP and it shoots 250 grains 3200 fps. I chambered a 338 RUM for my son and he shoots 180 accubonds at 3760 fps. It seems to be the most exciting of all of these and produces the most explosive results. My 338-378 did not seem impressive at 752 yds. Perfect lung hit and deer ran 50-60 yards with an exit hole little bigger than a quarter. That 180 accubond has a good advantage with its velocity and since we dont have many shots past 800 yards-the BC means very little if any at all. Only problem is brass. Not very good and hard to get. I am now chambering a barrel in 338 Lapua Imp to shoot the 180 accubonds. If I can get 3700 fps with 32" barrel and with Lapua brass I will be happy. Also chambered 300 RUM but like the 30-378 it is finicky having to small of hole for all that powder charge. Overbore can be a problem. I would like to go to 375RUM as it is the most efficient and probably the most inherently accurate RUM, but cant get Lapua brass</p></blockquote><p></p>
[QUOTE="jarnold37, post: 1947926, member: 29241"] I have two different reamers that I have used since before the 30-378 was offered as a factory chambering. Both of these reamers have no freebore. One is reamer is for small bullets and other is for heavier bullets. I have barrels with 14" twist and have shot 125's and 130's at 4000+ fps. This is a 26 lb gun and it has shot many 5 shot one ragged hole groups. I also qent to a 338-378 with a 2" BAT and 2" barrel in a 1000 yd heavy stock. This chamber also no free bore. 56 lbs and shoots 300 grain 2900 fps. Also chambered a 338LM IMP and it shoots 250 grains 3200 fps. I chambered a 338 RUM for my son and he shoots 180 accubonds at 3760 fps. It seems to be the most exciting of all of these and produces the most explosive results. My 338-378 did not seem impressive at 752 yds. Perfect lung hit and deer ran 50-60 yards with an exit hole little bigger than a quarter. That 180 accubond has a good advantage with its velocity and since we dont have many shots past 800 yards-the BC means very little if any at all. Only problem is brass. Not very good and hard to get. I am now chambering a barrel in 338 Lapua Imp to shoot the 180 accubonds. If I can get 3700 fps with 32" barrel and with Lapua brass I will be happy. Also chambered 300 RUM but like the 30-378 it is finicky having to small of hole for all that powder charge. Overbore can be a problem. I would like to go to 375RUM as it is the most efficient and probably the most inherently accurate RUM, but cant get Lapua brass [/QUOTE]
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