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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone own a 7mm 300 Win Mag?
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<blockquote data-quote="Kiwi Nate" data-source="post: 471859" data-attributes="member: 8533"><p>Hi Bighorn35, sorry for the late reply, have been away hunting.</p><p></p><p>Ok, nothing wrong with your proposed shoulder angle, means you can make use of a wider range of neck dies than my 7mm Practical.</p><p></p><p>You made a comment about wanting to avoid fireforming. By necking down from .300 to 7mm, the first load will be a fireforming looad regardless. This load will headspace partially off the belt and partially off the shoulder- depending on the reamer tolerances. Ive detailed all my findings on my website- 7mm Practical article. With belted mags, the belt is a great aid to fireforming, I have shot game out to 1100 yards with foreforming loads (by mistake). My fireforming loads usually go .5" while fireformed loads group .275". I don't use any special mild loads for fireforming. Fireforming is a chance to use up old powder and cheap bullets or just go straight ahead and use your normal accuracy load, perhaps limiting shots with the fireforming load to say 600 yards to be on the safe side (I have a client who does this).</p><p></p><p>Mine is a no neck turn either. No problems there.</p><p></p><p>I am not 100% sure you will be happy with the InterBond at long range. Once it gets down to 2100fps, it has a hard time expanding beyond 9mm. You wouldn't want to hunt with a Glock and FMJ ammo so I am sure you won't want to be limited in this regard. The Interbond is great out to 300 yards but as this is a long range forum, I will assume that you will want to hunt out to long ranges and utilize a bullet that will get the job done nicely at lower velocities. To this end, if you are a great fan of the InterBond, try the 154gr SST as a start point. You can then use the two projectiles (same form and form factor) interchangeably- one for woods hunting tougher animals, one for open country work. Again, I have plenty of notes on all of this stuff online if you want to take a bit of time to research it all. Another good bullet you may like to consider is the 162gr SST, its a very good allrounder, fairly high BC for a controlled expanding bullet. Downside of the SST and IB is they they can be a finnicky to load, some rifles have trouble with them and it can cost a lot (plus time) to obtain a sweet spot. Patience and flexibility are key.</p><p></p><p>I don't have a long throated rifle. Bullet jump is 40 thou, I don't much like the 400 thou jump that is popular at the moment. If you really want some freebore, you could copy the .308 Winchester design and have say around 100 thou jump- just as an example.</p><p></p><p>Ok, hope that helps get you started. You should be able to duplicate my velocities regardless of shoulder angle.</p><p></p><p>Nathan.</p></blockquote><p></p>
[QUOTE="Kiwi Nate, post: 471859, member: 8533"] Hi Bighorn35, sorry for the late reply, have been away hunting. Ok, nothing wrong with your proposed shoulder angle, means you can make use of a wider range of neck dies than my 7mm Practical. You made a comment about wanting to avoid fireforming. By necking down from .300 to 7mm, the first load will be a fireforming looad regardless. This load will headspace partially off the belt and partially off the shoulder- depending on the reamer tolerances. Ive detailed all my findings on my website- 7mm Practical article. With belted mags, the belt is a great aid to fireforming, I have shot game out to 1100 yards with foreforming loads (by mistake). My fireforming loads usually go .5" while fireformed loads group .275". I don't use any special mild loads for fireforming. Fireforming is a chance to use up old powder and cheap bullets or just go straight ahead and use your normal accuracy load, perhaps limiting shots with the fireforming load to say 600 yards to be on the safe side (I have a client who does this). Mine is a no neck turn either. No problems there. I am not 100% sure you will be happy with the InterBond at long range. Once it gets down to 2100fps, it has a hard time expanding beyond 9mm. You wouldn't want to hunt with a Glock and FMJ ammo so I am sure you won't want to be limited in this regard. The Interbond is great out to 300 yards but as this is a long range forum, I will assume that you will want to hunt out to long ranges and utilize a bullet that will get the job done nicely at lower velocities. To this end, if you are a great fan of the InterBond, try the 154gr SST as a start point. You can then use the two projectiles (same form and form factor) interchangeably- one for woods hunting tougher animals, one for open country work. Again, I have plenty of notes on all of this stuff online if you want to take a bit of time to research it all. Another good bullet you may like to consider is the 162gr SST, its a very good allrounder, fairly high BC for a controlled expanding bullet. Downside of the SST and IB is they they can be a finnicky to load, some rifles have trouble with them and it can cost a lot (plus time) to obtain a sweet spot. Patience and flexibility are key. I don't have a long throated rifle. Bullet jump is 40 thou, I don't much like the 400 thou jump that is popular at the moment. If you really want some freebore, you could copy the .308 Winchester design and have say around 100 thou jump- just as an example. Ok, hope that helps get you started. You should be able to duplicate my velocities regardless of shoulder angle. Nathan. [/QUOTE]
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Anyone own a 7mm 300 Win Mag?
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