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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
edge vs ultramag is there any difference
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<blockquote data-quote="LongBomber" data-source="post: 422811" data-attributes="member: 14435"><p>There is a little over 100fps difference. To actually have a fair test of the two you would need to shoot the rifle as a 338rum record the velocity, then re-chamber to edge and shoot again for velocity. I am not sure if anyone has done that. As well getting edge velocities from a 338rum is possible, but your pressures would be nearly "proof" loads. You would be way above the standard saami pressure for the rum casing. You will see guys crying about case life, and they are likely pushing the limit with pressures. If you need the speed get a larger casing.</p><p> </p><p>For your question about powder charges, it depends on the powder you use. For the same powder in both cases it would be a roughly 4-5grain increase. If you compare IMR7828 in the rum, and H-1000 in the edge there will be a large difference in the charge weight. Need to compare apples to apples.</p><p> </p><p>As to your scope problem. It depends on which Leupold rings you are using. The Leupold dual dovetail rings may not hold the scope with a braked rifle. They do not have much area holding the scope and have only one screw to tighten them. A set of Mk4 rings should hold. I run MK4 rings on my edge and have no problems at all. If you search on this site, several guys are running more than one set of large tactical rings on 338 edge and larger rifles. A rifle with a brake will start to move backwards with recoil before the effect of the gas hitting the brake starts to pull the rifle forward again. A braked rifle is very hard on scopes due to this.</p><p> </p><p>If you are thinking of having the throat re-cut in your 338 rum, you could have it re-chambered to an edge at the same time. You said that you have a 300rum as well, so with an edge you can stock up only one size of brass.</p></blockquote><p></p>
[QUOTE="LongBomber, post: 422811, member: 14435"] There is a little over 100fps difference. To actually have a fair test of the two you would need to shoot the rifle as a 338rum record the velocity, then re-chamber to edge and shoot again for velocity. I am not sure if anyone has done that. As well getting edge velocities from a 338rum is possible, but your pressures would be nearly "proof" loads. You would be way above the standard saami pressure for the rum casing. You will see guys crying about case life, and they are likely pushing the limit with pressures. If you need the speed get a larger casing. For your question about powder charges, it depends on the powder you use. For the same powder in both cases it would be a roughly 4-5grain increase. If you compare IMR7828 in the rum, and H-1000 in the edge there will be a large difference in the charge weight. Need to compare apples to apples. As to your scope problem. It depends on which Leupold rings you are using. The Leupold dual dovetail rings may not hold the scope with a braked rifle. They do not have much area holding the scope and have only one screw to tighten them. A set of Mk4 rings should hold. I run MK4 rings on my edge and have no problems at all. If you search on this site, several guys are running more than one set of large tactical rings on 338 edge and larger rifles. A rifle with a brake will start to move backwards with recoil before the effect of the gas hitting the brake starts to pull the rifle forward again. A braked rifle is very hard on scopes due to this. If you are thinking of having the throat re-cut in your 338 rum, you could have it re-chambered to an edge at the same time. You said that you have a 300rum as well, so with an edge you can stock up only one size of brass. [/QUOTE]
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edge vs ultramag is there any difference
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