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Throat burned out or not???
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<blockquote data-quote="Orange Dust" data-source="post: 1530055" data-attributes="member: 92702"><p>7MM Weatherby has about a half inch of freebore. The old German guns were nearly 3/4", and if memory serves, 1-12" twist. A 300 RUM has this concept too in a SAAMI chamber, but the freebore is less. So do some others. This is why everyone who shoots a RUM puts an extended length magazine in it for VLD bullets or shoots it single shot. This is not a conventional throat and has a different leade angle. The jump allows higher powder charges for a given cartridge capacity, and higher velocities. All the rules for OAL are thrown out the window. The 7MM Weatherby performs best at long range with medium weight bullets. On heavy game at shorter range, 160gr partitions are the go to bullet. It is a fine long range cartridge for most any game in North America, loaded with the right bullets. It is a very easy cartridge to load for. Some of the new VLD bullets like to jump. The ABLR from Nosler seems to be one of them. 1-10 twist will hold the weight down to about 160grs, unless you use a round nose bullet, but the whole Weatherby concept is high velocity, so they have always built their rifles with very conservative twist rates and lots of freebore to enhance this. Please don't lead the OP down the path of chasing the lands. It will only frustrate him and doesn't apply here. Everyone on this site will agree that maximum accuracy in almost every cartridge can be obtained by carefully adjusting seating depth. This doesn't apply so much here because if you had a bullet long enough to reach the lands the twist would keep you from being able to shoot it accurately, even if you single loaded it. Roy Weatherby built his whole business on the "Speed Kills" concept, and believed in it. Years ago he shot some Zebra with his .257 and some 87gr bullets loaded nearly 4000fps. They are said to be very tough and take a lot of gun. He got several DRT kills with it even shooting them in the paunch. Used the trip for some convincing ads back in the day. The OP will be fine with his gun. It will be accurate enough, shoot flat, and kill a long ways.</p></blockquote><p></p>
[QUOTE="Orange Dust, post: 1530055, member: 92702"] 7MM Weatherby has about a half inch of freebore. The old German guns were nearly 3/4", and if memory serves, 1-12" twist. A 300 RUM has this concept too in a SAAMI chamber, but the freebore is less. So do some others. This is why everyone who shoots a RUM puts an extended length magazine in it for VLD bullets or shoots it single shot. This is not a conventional throat and has a different leade angle. The jump allows higher powder charges for a given cartridge capacity, and higher velocities. All the rules for OAL are thrown out the window. The 7MM Weatherby performs best at long range with medium weight bullets. On heavy game at shorter range, 160gr partitions are the go to bullet. It is a fine long range cartridge for most any game in North America, loaded with the right bullets. It is a very easy cartridge to load for. Some of the new VLD bullets like to jump. The ABLR from Nosler seems to be one of them. 1-10 twist will hold the weight down to about 160grs, unless you use a round nose bullet, but the whole Weatherby concept is high velocity, so they have always built their rifles with very conservative twist rates and lots of freebore to enhance this. Please don't lead the OP down the path of chasing the lands. It will only frustrate him and doesn't apply here. Everyone on this site will agree that maximum accuracy in almost every cartridge can be obtained by carefully adjusting seating depth. This doesn't apply so much here because if you had a bullet long enough to reach the lands the twist would keep you from being able to shoot it accurately, even if you single loaded it. Roy Weatherby built his whole business on the "Speed Kills" concept, and believed in it. Years ago he shot some Zebra with his .257 and some 87gr bullets loaded nearly 4000fps. They are said to be very tough and take a lot of gun. He got several DRT kills with it even shooting them in the paunch. Used the trip for some convincing ads back in the day. The OP will be fine with his gun. It will be accurate enough, shoot flat, and kill a long ways. [/QUOTE]
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Throat burned out or not???
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