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Rifles, Reloading, Optics, Equipment
Reloading
.257 bee 90gr absolute
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<blockquote data-quote="Pdvdh" data-source="post: 2550606" data-attributes="member: 4191"><p><strong>25 WSM</strong>:</p><p> Fired 4 additional <u>90gr Absolute Hammer</u>s today from my 25 WSM to collect MVs and monitor pressure. MVs collected with LabRadar.</p><p> Norma 270 WSM parent cases.</p><p> <strong>Federal 210</strong></p><p> <strong>H4831SC</strong></p><p> 0.030" jump with 2.907" OACL</p><p> </p><p> <strong>65.0</strong>gr > <strong>3,616</strong>fps > ~0.0005" case head swell.</p><p> <strong>66.0</strong>gr > <strong>3,729</strong>fps > ~0.0007" case head swell.</p><p> <strong>67.0</strong>gr > <strong>3,769</strong>fps > ~0.0009" case head swell.</p><p> <strong>68.0</strong>gr > <strong>3,816</strong>fps > ~0.0012" case head swell.</p><p></p><p>MV shows a big jump from 65gr to 66gr. Then a similar increase with each additional grain of powder. I almost fired a round at 69gr, but pretty sure I'd have just ruined a casing. Bolt lift was increasing at 68gr and a light plunger imprint became visible, but was no brass shearing. Pressure with H4831SC at 3,816fps was clearly less than the pressure with H4350 at 3,847fps.</p><p></p><p>I think I could shoot this bullet around 3,800 with H4831SC with good Norma brass life. Gain ~75fps with H4831SC, over H4350. I don't see a MV node in the midst of these four H4831SC powder charges. </p><p></p><p>Plan to shoot H4350 around 3,725fps on paper, cuz it looked like a velocity node there. I might next shoot targets with H4831SC, depending on the precision from the H4350 loads.</p><p></p><p>My 25 WSM water capacity on a virgin, unfired case was ~76.2gr H20. Water capacity in a fully pressured case is <u>77.8gr H20</u>, with these Norma 270 WSM parent cases.</p><p></p><p>If I get a few ADG 300 WSM cases from CA48, I'll see if they'll withstand a higher velocity node while preserving good primer pocket life. I do expect the ADG brass will be stronger than my Norma.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 2550606, member: 4191"] [B]25 WSM[/B]: Fired 4 additional [U]90gr Absolute Hammer[/U]s today from my 25 WSM to collect MVs and monitor pressure. MVs collected with LabRadar. Norma 270 WSM parent cases. [B]Federal 210[/B] [B]H4831SC[/B] 0.030" jump with 2.907" OACL [B]65.0[/B]gr > [B]3,616[/B]fps > ~0.0005" case head swell. [B]66.0[/B]gr > [B]3,729[/B]fps > ~0.0007" case head swell. [B]67.0[/B]gr > [B]3,769[/B]fps > ~0.0009" case head swell. [B]68.0[/B]gr > [B]3,816[/B]fps > ~0.0012" case head swell. MV shows a big jump from 65gr to 66gr. Then a similar increase with each additional grain of powder. I almost fired a round at 69gr, but pretty sure I'd have just ruined a casing. Bolt lift was increasing at 68gr and a light plunger imprint became visible, but was no brass shearing. Pressure with H4831SC at 3,816fps was clearly less than the pressure with H4350 at 3,847fps. I think I could shoot this bullet around 3,800 with H4831SC with good Norma brass life. Gain ~75fps with H4831SC, over H4350. I don't see a MV node in the midst of these four H4831SC powder charges. Plan to shoot H4350 around 3,725fps on paper, cuz it looked like a velocity node there. I might next shoot targets with H4831SC, depending on the precision from the H4350 loads. My 25 WSM water capacity on a virgin, unfired case was ~76.2gr H20. Water capacity in a fully pressured case is [U]77.8gr H20[/U], with these Norma 270 WSM parent cases. If I get a few ADG 300 WSM cases from CA48, I'll see if they'll withstand a higher velocity node while preserving good primer pocket life. I do expect the ADG brass will be stronger than my Norma. [/QUOTE]
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.257 bee 90gr absolute
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