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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
vihtavuori n500 series powders
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<blockquote data-quote="brianwinzor" data-source="post: 76961" data-attributes="member: 1067"><p>GoodGrouper, Interesting to hear about the abrasiveness of N550 in your rifle, and that others have experienced similar problems. I have only fired about 100 shots with this powder during accuracy testing and chronographing in my .17/222 mag imp with the 25 and 30 grain bullets, so am unable to determine whether it did cause any significant erosion on the throat of my barrel. Velocity wise, it appears to give up to 100 fps more than W760 and H414, however, I noticed that accuracy was ordinary while working up to maximum pressure, then suddenly at maximum pressure the group size reduced dramatically. </p><p></p><p>I have used N560 in a variety of cases including .17/222mag imp, 224 Clark, 22/250AI, 25/06AI, and in no instance has it delivered highest velocity or best accuracy. I found that like N550 good accuracy was only achieved at maximum pressure, which certainly restricts its usefullness. </p><p></p><p>So far I have found that N165 to be an excellent powder with the heavier bullets, and have just started testing N170 in the 25/06 AI with the 130 and 142 grain Wildcat bullets. </p><p></p><p>Despite the cost of about $105 Australian, I would probably buy more N165 and N170, but am most unlikely to buy anymore of the N500 series powders.</p></blockquote><p></p>
[QUOTE="brianwinzor, post: 76961, member: 1067"] GoodGrouper, Interesting to hear about the abrasiveness of N550 in your rifle, and that others have experienced similar problems. I have only fired about 100 shots with this powder during accuracy testing and chronographing in my .17/222 mag imp with the 25 and 30 grain bullets, so am unable to determine whether it did cause any significant erosion on the throat of my barrel. Velocity wise, it appears to give up to 100 fps more than W760 and H414, however, I noticed that accuracy was ordinary while working up to maximum pressure, then suddenly at maximum pressure the group size reduced dramatically. I have used N560 in a variety of cases including .17/222mag imp, 224 Clark, 22/250AI, 25/06AI, and in no instance has it delivered highest velocity or best accuracy. I found that like N550 good accuracy was only achieved at maximum pressure, which certainly restricts its usefullness. So far I have found that N165 to be an excellent powder with the heavier bullets, and have just started testing N170 in the 25/06 AI with the 130 and 142 grain Wildcat bullets. Despite the cost of about $105 Australian, I would probably buy more N165 and N170, but am most unlikely to buy anymore of the N500 series powders. [/QUOTE]
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vihtavuori n500 series powders
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