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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need re-chamber ideas for old Mk V 9 lug 270WbyMag
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<blockquote data-quote="VinceMule" data-source="post: 2977027" data-attributes="member: 122164"><p>OP, The Easy button on the tried and true with no miss match between the reamer and dies, with no issues on the Cartridge overall length and magazine length</p><p></p><p> extremely accurate, and great brass(AGD) is available also, but no flies on Winchester or Remington brass, a testimony of just how accurate this cartridge is:</p><p></p><p>7 Rem Mag-.210 freebore instead of the SAAMI freebore of .110 for the 175-180s on elk. Pac Nor can do this job for you.</p><p>26" 9 Twist barrel</p><p>175g at 2850 fps with R#22, cci 250</p><p>175 at 3050 fps with R#26, Federal 215</p><p>Both of these shoot groups less than 3/8" at 100 yds</p><p></p><p>150-154G AT 3200 with R#25 and Win Mag primers, shoot groups sub 3/8"</p><p></p><p>I killed two bulls with 140g Noslers at 3250 fps, a very top-end load of IMR 4350, Rem brass, Rem 9 1/2</p><p>sub 3/8" groups where the bullets were just barely touching the lands. Both Bulls flopped on bullet impact, one never even kicked a hind leg, the other kicked a hind leg once or twice, but neither even made the slightest effort to get up, DRT!</p><p></p><p>The 28 Nosler shoots the 175g-180g at 3100-3150 fps, and the 160ish at 3200-3350, equal to the 7 STW in all ways.</p><p></p><p>I have had all three, I am sticking with the 7 Rem Mag with a 27" #5 contour barrel where the word Accurate is an understatement, Not to mention the ease of load development, pick a bullet!</p><p></p><p>I have had several of the 257 Weatherby with very short freebore where the 100g are doing 3850 fps, shooting tiny bug holes,</p><p>110g Accubonds and 115g Bergers are doing 3600, all with amazing accuracy with very little recoil, using a Gentry muzzle break.</p><p>You see the bullet impact the animal, water vapor fly off the animal, and bullet impact many times after the bullet exits the animal.</p><p>A friend killed 6 Bulls with his Mark 5 using 117g Factory ammo, then a guide told him it was NOT an Elk round. He then got a 6.5/284 but the bulls started running off where previously they flopped. Again, Pac Nor can do the job on the 257 Weatherby with very short freebore.</p><p></p><p>OP, Consider having a switch barrel made for your Weatherby, very easy to do as the gunsmith sets the headspace, you just screw them on and off like Lug Nuts. Many consider the 30 calibers preferable to anything, but recoil goes up substantially unless you use a good Tactical type of muzzle break. The lowly 300 Winchester with a 200g is heavy-duty elk medicine, but the recoil is over my tolerance level.</p></blockquote><p></p>
[QUOTE="VinceMule, post: 2977027, member: 122164"] OP, The Easy button on the tried and true with no miss match between the reamer and dies, with no issues on the Cartridge overall length and magazine length extremely accurate, and great brass(AGD) is available also, but no flies on Winchester or Remington brass, a testimony of just how accurate this cartridge is: 7 Rem Mag-.210 freebore instead of the SAAMI freebore of .110 for the 175-180s on elk. Pac Nor can do this job for you. 26" 9 Twist barrel 175g at 2850 fps with R#22, cci 250 175 at 3050 fps with R#26, Federal 215 Both of these shoot groups less than 3/8" at 100 yds 150-154G AT 3200 with R#25 and Win Mag primers, shoot groups sub 3/8" I killed two bulls with 140g Noslers at 3250 fps, a very top-end load of IMR 4350, Rem brass, Rem 9 1/2 sub 3/8" groups where the bullets were just barely touching the lands. Both Bulls flopped on bullet impact, one never even kicked a hind leg, the other kicked a hind leg once or twice, but neither even made the slightest effort to get up, DRT! The 28 Nosler shoots the 175g-180g at 3100-3150 fps, and the 160ish at 3200-3350, equal to the 7 STW in all ways. I have had all three, I am sticking with the 7 Rem Mag with a 27" #5 contour barrel where the word Accurate is an understatement, Not to mention the ease of load development, pick a bullet! I have had several of the 257 Weatherby with very short freebore where the 100g are doing 3850 fps, shooting tiny bug holes, 110g Accubonds and 115g Bergers are doing 3600, all with amazing accuracy with very little recoil, using a Gentry muzzle break. You see the bullet impact the animal, water vapor fly off the animal, and bullet impact many times after the bullet exits the animal. A friend killed 6 Bulls with his Mark 5 using 117g Factory ammo, then a guide told him it was NOT an Elk round. He then got a 6.5/284 but the bulls started running off where previously they flopped. Again, Pac Nor can do the job on the 257 Weatherby with very short freebore. OP, Consider having a switch barrel made for your Weatherby, very easy to do as the gunsmith sets the headspace, you just screw them on and off like Lug Nuts. Many consider the 30 calibers preferable to anything, but recoil goes up substantially unless you use a good Tactical type of muzzle break. The lowly 300 Winchester with a 200g is heavy-duty elk medicine, but the recoil is over my tolerance level. [/QUOTE]
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Need re-chamber ideas for old Mk V 9 lug 270WbyMag
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