Is my .223 rifle chamber overly long?

Mort4570

October 10, 2011 16:51

I hand seated a cartridge case with bullet in it in my rifle's chamber,and I have at least .030 to play with...the chamber is that much longer than the oal shown in the books for .223 rounds. Is this much extra room 'normal'? my Rossi is not very accurate and I"m wondering if this could attribute to that..that and me not being the world's best shooter.
I am unable to ever get a 1" ,3 shot group at 50 yards,heck,even 2" is a rarity. I know,rossi's suck,but I"m hoping...

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  FrancF

  October 10, 2011 17:47

  http://ar15barrels.com/data/223vs556.pdf
  In short. if your barrel is a 5.56. nato. Chamber, the free bore is about right. Not citing this a fact but my suspicion.

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  Mort4570

  October 10, 2011 22:24

  the barrel is stamped .223,but the dimensions sure match up with 5.56. Howver,i'll continue to load to .223 specs as far as powder load just to play safe.May try to load longer bullets and see what it does or does not accomplish.
  thanks FrancF

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  Mobuck

  October 11, 2011 00:55

  Are you trying to load so the bullets are closer to the lands? In a single shot, that's no problem as long as you don't get the bullet stuck in the rifling. Loading "longer bullets" is not the answer. Loading the rounds to a longer OAL might be. Depending on the rifling twist, loading longer/heavier bullets might make accuracy worse. I had a customer who raved about the accuracy of his Rossi rifles and the one we have now is no slouch with properly loaded ammo.

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  FrancF

  October 13, 2011 20:42

  quote:Originally posted by Mort4570
  the barrel is stamped .223,but the dimensions sure match up with 5.56. Howver,i'll continue to load to .223 specs as far as powder load just to play safe.May try to load longer bullets and see what it does or does not accomplish.
  thanks FrancF
  
  
  This is outside of my manufacturing expertise/knowledge too be 110%, Correct. What I do know, .223/5.56 Import stamps can be misleading.

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  Mort4570

  October 13, 2011 21:37

  Mobuck ,by 'longer bullets' I meant longer oal,sorry about the choice of words.My Rossi is not very accurate and i'm trying to see if I can change that by trying various things.
  It has a 1 in 12 twist,fyi.

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