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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
New rifle build picked up ...
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<blockquote data-quote="IdahoCTD" data-source="post: 1215170" data-attributes="member: 13110"><p>3 to 3.5 grains of capacity doesn't translate into 3 to 3.5grs of additional powder. Most of the time the loads only vary about 1 to 1.5grs between all the variations. If you look at the capacity of a 300wm compared to a 30-8mm there is about 8grs of difference between the two. The velocity difference between the 2 with heavy bullets is typically 100-150fps with equal barrel lengths. As you go up in capacity, in the same bore size, the fps per grain of capacity goes down. So if you break that down the 3 grains of capacity is worth about 50fps on the high end. Where they liked to shoot for me was about 30fps difference like I said. The gain per grain of capacity gets worse when you go up to a 300RUM or 30-378 from a 30-8mm or similar cases.</p></blockquote><p></p>
[QUOTE="IdahoCTD, post: 1215170, member: 13110"] 3 to 3.5 grains of capacity doesn't translate into 3 to 3.5grs of additional powder. Most of the time the loads only vary about 1 to 1.5grs between all the variations. If you look at the capacity of a 300wm compared to a 30-8mm there is about 8grs of difference between the two. The velocity difference between the 2 with heavy bullets is typically 100-150fps with equal barrel lengths. As you go up in capacity, in the same bore size, the fps per grain of capacity goes down. So if you break that down the 3 grains of capacity is worth about 50fps on the high end. Where they liked to shoot for me was about 30fps difference like I said. The gain per grain of capacity gets worse when you go up to a 300RUM or 30-378 from a 30-8mm or similar cases. [/QUOTE]
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New rifle build picked up ...
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