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Rifles, Reloading, Optics, Equipment
Reloading
280 AI 140 gr TTSX
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<blockquote data-quote="Engineering101" data-source="post: 962205" data-attributes="member: 63138"><p><strong>Re: 280 ia 140 gr ttsx</strong></p><p></p><p>ramrod79</p><p> </p><p>A week ago I was helping a friend of mine work up some loads for his new Kimber Montana in 280 AI using the 140 TTSX with H4831SC. We tried a ladder of 8 different load groups of 3 spaced 0.5 grains apart for a total of 24 rounds. I was kind of surprised to see such a light rifle put almost everything into about 1 inch at 100 yards. One load ran 1.25" so we only fired two of those. One load was about 0.75" and everything else right close to 1 inch.</p><p> </p><p>If we fired all shots at the same point of aim it would have torn a 1 inch hole in the target. I don't remember seeing a rifle do that with such a wide variation in the quantity of powder used. We figured to use the fastest load at this point since they were all about the same group size.</p><p> </p><p>This was the first try with a brand new rifle, no barrel break in. He plans to use this as his backpack rifle and will not shoot it past 400 yards. This guy has a 300 RUM that he uses unbraked and this little 280 AI wore him out by round number 20. It has some bite at that light weight. Shoots good though. COAL was set so the rounds would fit the mag so there might be some improvement to be had by adjusting seating depth but it is good enough as it is since he is staying inside 400 yards. The 300 is his long range rig and it shot better than the 280 but it is a semi custom.</p></blockquote><p></p>
[QUOTE="Engineering101, post: 962205, member: 63138"] [b]Re: 280 ia 140 gr ttsx[/b] ramrod79 A week ago I was helping a friend of mine work up some loads for his new Kimber Montana in 280 AI using the 140 TTSX with H4831SC. We tried a ladder of 8 different load groups of 3 spaced 0.5 grains apart for a total of 24 rounds. I was kind of surprised to see such a light rifle put almost everything into about 1 inch at 100 yards. One load ran 1.25" so we only fired two of those. One load was about 0.75" and everything else right close to 1 inch. If we fired all shots at the same point of aim it would have torn a 1 inch hole in the target. I don't remember seeing a rifle do that with such a wide variation in the quantity of powder used. We figured to use the fastest load at this point since they were all about the same group size. This was the first try with a brand new rifle, no barrel break in. He plans to use this as his backpack rifle and will not shoot it past 400 yards. This guy has a 300 RUM that he uses unbraked and this little 280 AI wore him out by round number 20. It has some bite at that light weight. Shoots good though. COAL was set so the rounds would fit the mag so there might be some improvement to be had by adjusting seating depth but it is good enough as it is since he is staying inside 400 yards. The 300 is his long range rig and it shot better than the 280 but it is a semi custom. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
280 AI 140 gr TTSX
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