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<blockquote data-quote="liltank" data-source="post: 893941" data-attributes="member: 13275"><p>I usually start 2 grains under book max and work my way up in half grain increments. (Not suggesting you try this) but if I see there are no signs of over pressure, I will start to work my way over max to find a better group or see what the max pressure is. Indications of max pressure are primers that are pierced or flattened, and ejector marks on the case head. </p><p></p><p>I always start with my bullets .010-.015" off the lands. Usually .015". I pick one primer and stick with it, unless two of the following things happen: I get an unexplained flyer in a 3 shot group, or I can't get loads to group after attempting seating depth changes. Should you get a 3 shot clover leaf that rounds are not touching, adjust length in and out. Chances are that just moving the bullet .005" in or out from your starting length will pull the group together.</p><p></p><p>I always use three shots. I know a gunsmith that uses 2 shot groups. I like that third shot assurance as that is when I usually see a flyer. Make sure you use a sound repeatable rest. Keep things consistent. Do not use a bipod on a hard surface. If you have to use a bipod on a hard surface, then use a thing pad of some type to absorb the bounce from recoil. I've produced many small groups from a bipod, but used the above advice to do it. </p><p></p><p>I currently use a Caldwell Rock BR front rest with a leather rear bag. It works really well for load testing. </p><p></p><p>Tank</p></blockquote><p></p>
[QUOTE="liltank, post: 893941, member: 13275"] I usually start 2 grains under book max and work my way up in half grain increments. (Not suggesting you try this) but if I see there are no signs of over pressure, I will start to work my way over max to find a better group or see what the max pressure is. Indications of max pressure are primers that are pierced or flattened, and ejector marks on the case head. I always start with my bullets .010-.015" off the lands. Usually .015". I pick one primer and stick with it, unless two of the following things happen: I get an unexplained flyer in a 3 shot group, or I can't get loads to group after attempting seating depth changes. Should you get a 3 shot clover leaf that rounds are not touching, adjust length in and out. Chances are that just moving the bullet .005" in or out from your starting length will pull the group together. I always use three shots. I know a gunsmith that uses 2 shot groups. I like that third shot assurance as that is when I usually see a flyer. Make sure you use a sound repeatable rest. Keep things consistent. Do not use a bipod on a hard surface. If you have to use a bipod on a hard surface, then use a thing pad of some type to absorb the bounce from recoil. I've produced many small groups from a bipod, but used the above advice to do it. I currently use a Caldwell Rock BR front rest with a leather rear bag. It works really well for load testing. Tank [/QUOTE]
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