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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth in .270
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<blockquote data-quote="Reloader222" data-source="post: 950977" data-attributes="member: 25295"><p>Crimping in the canular is in general not practiced by most reloaders on the .270Win - unless your sizing die does not size small enough to give you a proper crimp. If you can push the bullet in by hand it is advisable to take out the expander ball when you resize. This would then give a proper grip on the bullet. Reason why we do not crimp in the canulure is it cause the neck to make a small bubble at that area and it could contribute towards inaccuracy. </p><p> </p><p>I never crimped in my 30 years of reloading on my .270 Win. Maybe if it was a Magnum then it could be advisable, but then I would rather go for the Lee Factory Crimp die. </p><p> </p><p>Crimping in the canulare would also imply that you are not going to get the same OAL you would like. It is not a problem to be 0.020" off the lands but you must be cautious since it could result in higher pressure. However, if you do not load maximum charges, it should not be a problem. It usually improve accuracy. </p><p> </p><p>The only other thing you need to look at is to have the bullet at least a calibre dept inside the case neck. This also helps with accuracy and getting a beter velocity. For instance a bullet seated only 0.200" inside the case would yield much less velocity than a bullet being seated at least 0.278" inside the case neck. Take a hack saw and saw the neck of a case up to the shoulder. This would give you a view of how much bullet is inside the case neck. You can use this same case to determine OAL of difference bullets. Remember different bullets can give you different OAL due to the ogive of the bullets being different. So when you change to another bullet, you need to measure the OAL again. Go to this site for instructions and then go to Reloading and Shooting Tech Tips and then to "the best OAL for accuracy":</p><p> </p><p><a href="http://www.larrywillis.com/" target="_blank">Innovative Technologies - Reloading Equipment</a></p></blockquote><p></p>
[QUOTE="Reloader222, post: 950977, member: 25295"] Crimping in the canular is in general not practiced by most reloaders on the .270Win - unless your sizing die does not size small enough to give you a proper crimp. If you can push the bullet in by hand it is advisable to take out the expander ball when you resize. This would then give a proper grip on the bullet. Reason why we do not crimp in the canulure is it cause the neck to make a small bubble at that area and it could contribute towards inaccuracy. I never crimped in my 30 years of reloading on my .270 Win. Maybe if it was a Magnum then it could be advisable, but then I would rather go for the Lee Factory Crimp die. Crimping in the canulare would also imply that you are not going to get the same OAL you would like. It is not a problem to be 0.020" off the lands but you must be cautious since it could result in higher pressure. However, if you do not load maximum charges, it should not be a problem. It usually improve accuracy. The only other thing you need to look at is to have the bullet at least a calibre dept inside the case neck. This also helps with accuracy and getting a beter velocity. For instance a bullet seated only 0.200" inside the case would yield much less velocity than a bullet being seated at least 0.278" inside the case neck. Take a hack saw and saw the neck of a case up to the shoulder. This would give you a view of how much bullet is inside the case neck. You can use this same case to determine OAL of difference bullets. Remember different bullets can give you different OAL due to the ogive of the bullets being different. So when you change to another bullet, you need to measure the OAL again. Go to this site for instructions and then go to Reloading and Shooting Tech Tips and then to "the best OAL for accuracy": [URL="http://www.larrywillis.com/"]Innovative Technologies - Reloading Equipment[/URL] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth in .270
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