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Rifles, Reloading, Optics, Equipment
Reloading
plastic flow of primer material
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<blockquote data-quote="Murtfree" data-source="post: 2978265" data-attributes="member: 111090"><p>The brass brand certainly seems to be the deciding factor. In over 50 years of loading I have experienced most of the problems shown in this thread at one time or another especially near maximum loads. Recently I decided to bring my 300 Wby built in 1992 out of retirement for an upcoming moose hunt. I picked up some new Peterson Brass to load since I didn't have enough old Weatherby brass to prepare for the trip. I had used Peterson Brass in the past and have nothing but praise for this brass. No matter how hard I pushed my loads (6.5-300 Wby) primer pockets remained extremely tight and never loosened one bit after multiple loadings. My old 300 Wby load was 86.5 grains of 7828 with a 180 grain bullet (3160 FPS) but wanted to check cases for H20 capacity before I started just changing out brass. Amazingly the Peterson .300 cases weighed 25 grains heavier than the Wby and the H20 Capacity was 6 grains less with Peterson. I started with 2 shots of each load shot over my Oehler beginning with 83 grains which yielded 3050 FPS to try to duplicate the velocity of my old hunting load. At 85 grains in Peterson brass I was duplicating the old 86.5 grain velocity while using Weatherby brass. I continued up by 0.5 grains until I hit the old load of 86.5 of 7828 which yielded 3225 FPS. This was just a test as the primers were showing definite signs of pressure and were completely flat and I settled on 85.5 as my final load giving 3185 FPS. After resizing and repriming this brass, primer pockets were just as tight as the initial loading. In fact I find Peterson brass to have very tight primer pockets which require significant effort to seat a new primer. I have been slowly switching all my brass over to Peterson for this reason as many types of brass, especially nosler, are trash due to loose primer pockets after 2 or 3 firings. I'm making an assumption but I feel the extra 25 grains of brass in those 300 Wby Peterson cases is in the head area making them extremely pressure tolerant</p></blockquote><p></p>
[QUOTE="Murtfree, post: 2978265, member: 111090"] The brass brand certainly seems to be the deciding factor. In over 50 years of loading I have experienced most of the problems shown in this thread at one time or another especially near maximum loads. Recently I decided to bring my 300 Wby built in 1992 out of retirement for an upcoming moose hunt. I picked up some new Peterson Brass to load since I didn't have enough old Weatherby brass to prepare for the trip. I had used Peterson Brass in the past and have nothing but praise for this brass. No matter how hard I pushed my loads (6.5-300 Wby) primer pockets remained extremely tight and never loosened one bit after multiple loadings. My old 300 Wby load was 86.5 grains of 7828 with a 180 grain bullet (3160 FPS) but wanted to check cases for H20 capacity before I started just changing out brass. Amazingly the Peterson .300 cases weighed 25 grains heavier than the Wby and the H20 Capacity was 6 grains less with Peterson. I started with 2 shots of each load shot over my Oehler beginning with 83 grains which yielded 3050 FPS to try to duplicate the velocity of my old hunting load. At 85 grains in Peterson brass I was duplicating the old 86.5 grain velocity while using Weatherby brass. I continued up by 0.5 grains until I hit the old load of 86.5 of 7828 which yielded 3225 FPS. This was just a test as the primers were showing definite signs of pressure and were completely flat and I settled on 85.5 as my final load giving 3185 FPS. After resizing and repriming this brass, primer pockets were just as tight as the initial loading. In fact I find Peterson brass to have very tight primer pockets which require significant effort to seat a new primer. I have been slowly switching all my brass over to Peterson for this reason as many types of brass, especially nosler, are trash due to loose primer pockets after 2 or 3 firings. I'm making an assumption but I feel the extra 25 grains of brass in those 300 Wby Peterson cases is in the head area making them extremely pressure tolerant [/QUOTE]
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Reloading
plastic flow of primer material
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