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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Standard 270 win
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<blockquote data-quote="Stammster" data-source="post: 2216295" data-attributes="member: 114381"><p>The 270 Win is an exceptional deer caliber. I have multiple 270's, in bolt guns (Win M70 and Kimber 84L), as well as gas guns (Rem 7400 and BAR).</p><p></p><p>Here are my thoughts and experiences, specific for your Remingtion Model 7400 - if you decide to reload.</p><p></p><p>1.) You cannot run traditional slow burning powders in this gas gun, such as H4831SC and RL26. The timing will be off, and it will not cycle correctly. This creates a lot of stress and wear on the gun, and also the extractor damages the case rim. At max loads, I even had some cases fail to eject. These powders seem to work only if you are near minimum /starting loads, and for that reason are better choices. The 7400 doesn't not have an adjustable gas block option, and unless you find a qualified gunsmith that can re-port yours, I would stay away from any powders slower than H4350.</p><p>I have loads developed with H4350 (130-150 gr) and IMR-4064 (130gr) that shoot and cycle great.</p><p></p><p>2.) I have issue feeding exposed lead bullets in my 7400. This may be specific to my gun and feedthroat, but could also be an issue with 7400s in general. Even if the cartridge feeds, these tips are visibly damaged (shave off and dented) when I unchamber a live round. For that reason, I exclusively use polymer tipped bullets in this gun. Nosler Ballistic tips or Hornady SSTs.</p><p></p><p>3.) The key to the above bullets (NBT and SSTs) is to not drive them too hard, or they will separate on impact. They seem to work best in the 2400-2700 fps impact velocity range, so keep this in mind. You should easily be able to get 3100 fps MV in the 22" 7400 if you load H4350 under 130gr bullets. However at shots <100 yds, you will have too much impact velocity. For that reason, you might want to try 140 or 150gr. Given your stated 400 yd max, the higher BC might actually give you better longer range performance than a 130 and also address the close shot issues. I personally don't shoot over 200 yards where I hunt deer, so I just shoot 130s over a medium load of H4350 - for a MV in the 2900-2950 fps range - that shoots accurately.</p><p>Side note: 140 gr NBTs are actually higher MV than 130 NBTs given the same case, powder charge, and COAL. This baffled me at first, but when I ran it in QL, the 140s are a longer bullet, taking up more case capacity ... which actually resulted in a higher pressure/MV. Go figure.</p><p></p><p>4.) 7400s can be incredibly accurate, but have some inherent issues that can effect vertical spread. a.). Vertical POI is greatly effected by the forearm screw tension. This become very apparent if this becomes loose, or is removed and reinstall after a thorough cleaning. I've seen as much as 10" (@100 yds) difference. b.). As the barrel heats up, this also changes the POI. I've seens 1-1.5" difference (upwards) from a cool to hot barrel (I.e. 4-5 shots). This is a nice feature when deer run away from you after the first missed shot, as it self compensates for elevation required to stay on target <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />. In summary, once I figure this out and Locktited my forearm screw - mine is a solid 0.75-1 MOA gun.</p><p></p><p>5.) Keep you chamber clean and dry. If you don't have the chamber cleaning brush that came originally with the gun, then buy one. Dirty, damaged (corroded/pitted), and oily chambers will result in extraction issues. This is the main reason why Rem 742/740/7400 have such a bad reputation and given the name (jam-o-matics). The earlier versions were are known for receiver rail wear also.</p><p></p><p>Good luck. My 7400 spends most of its time in the safe, as my BAR is an overall better 270 Win semi-automatic. But it still can't handle slow powders.</p></blockquote><p></p>
[QUOTE="Stammster, post: 2216295, member: 114381"] The 270 Win is an exceptional deer caliber. I have multiple 270’s, in bolt guns (Win M70 and Kimber 84L), as well as gas guns (Rem 7400 and BAR). Here are my thoughts and experiences, specific for your Remingtion Model 7400 - if you decide to reload. 1.) You cannot run traditional slow burning powders in this gas gun, such as H4831SC and RL26. The timing will be off, and it will not cycle correctly. This creates a lot of stress and wear on the gun, and also the extractor damages the case rim. At max loads, I even had some cases fail to eject. These powders seem to work only if you are near minimum /starting loads, and for that reason are better choices. The 7400 doesn’t not have an adjustable gas block option, and unless you find a qualified gunsmith that can re-port yours, I would stay away from any powders slower than H4350. I have loads developed with H4350 (130-150 gr) and IMR-4064 (130gr) that shoot and cycle great. 2.) I have issue feeding exposed lead bullets in my 7400. This may be specific to my gun and feedthroat, but could also be an issue with 7400s in general. Even if the cartridge feeds, these tips are visibly damaged (shave off and dented) when I unchamber a live round. For that reason, I exclusively use polymer tipped bullets in this gun. Nosler Ballistic tips or Hornady SSTs. 3.) The key to the above bullets (NBT and SSTs) is to not drive them too hard, or they will separate on impact. They seem to work best in the 2400-2700 fps impact velocity range, so keep this in mind. You should easily be able to get 3100 fps MV in the 22” 7400 if you load H4350 under 130gr bullets. However at shots <100 yds, you will have too much impact velocity. For that reason, you might want to try 140 or 150gr. Given your stated 400 yd max, the higher BC might actually give you better longer range performance than a 130 and also address the close shot issues. I personally don’t shoot over 200 yards where I hunt deer, so I just shoot 130s over a medium load of H4350 - for a MV in the 2900-2950 fps range - that shoots accurately. Side note: 140 gr NBTs are actually higher MV than 130 NBTs given the same case, powder charge, and COAL. This baffled me at first, but when I ran it in QL, the 140s are a longer bullet, taking up more case capacity ... which actually resulted in a higher pressure/MV. Go figure. 4.) 7400s can be incredibly accurate, but have some inherent issues that can effect vertical spread. a.). Vertical POI is greatly effected by the forearm screw tension. This become very apparent if this becomes loose, or is removed and reinstall after a thorough cleaning. I’ve seen as much as 10” (@100 yds) difference. b.). As the barrel heats up, this also changes the POI. I’ve seens 1-1.5” difference (upwards) from a cool to hot barrel (I.e. 4-5 shots). This is a nice feature when deer run away from you after the first missed shot, as it self compensates for elevation required to stay on target :). In summary, once I figure this out and Locktited my forearm screw - mine is a solid 0.75-1 MOA gun. 5.) Keep you chamber clean and dry. If you don’t have the chamber cleaning brush that came originally with the gun, then buy one. Dirty, damaged (corroded/pitted), and oily chambers will result in extraction issues. This is the main reason why Rem 742/740/7400 have such a bad reputation and given the name (jam-o-matics). The earlier versions were are known for receiver rail wear also. Good luck. My 7400 spends most of its time in the safe, as my BAR is an overall better 270 Win semi-automatic. But it still can’t handle slow powders. [/QUOTE]
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