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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.223 vs 5.56 Chambers - HUGE bullet jump?
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<blockquote data-quote="bookworm" data-source="post: 453550" data-attributes="member: 13840"><p>Hi fellas - thanks for the replies.</p><p> </p><p>Most of the ammo I've put through it has been some PMC 55gr FMJ BT. The barrel is 1:9. This ammo has produced roughly 2.5 moa. I know others with pretty standard AR-15 setups that are getting moa with this ammo...so I was hoping for better.</p><p> </p><p>I'm in process of loading some 69gr SMK's with Varget as propellant. My hope is to get something closer to moa performance with these rounds. It was in the loading process where I discovered this very long freebore/jump and am wondering if this is normal or not. I know it certainly is not for bolt rifles. I've read a few other sources (not necessarily reliable) that say the difference in freebore between these two chamberings is an order of magnitude (10x) smaller than what I'm finding.</p><p> </p><p>The barrel is floated, but you make a good point on the trigger - it is terrible. It is on my list to improve...as is fire lapping.</p><p> </p><p>Anyway...I'm still hoping to get some solid confirmation that my chamber freebore is normal so I can cross that item off my worry list.</p><p> </p><p>Thanks for the discussion.</p></blockquote><p></p>
[QUOTE="bookworm, post: 453550, member: 13840"] Hi fellas - thanks for the replies. Most of the ammo I've put through it has been some PMC 55gr FMJ BT. The barrel is 1:9. This ammo has produced roughly 2.5 moa. I know others with pretty standard AR-15 setups that are getting moa with this ammo...so I was hoping for better. I'm in process of loading some 69gr SMK's with Varget as propellant. My hope is to get something closer to moa performance with these rounds. It was in the loading process where I discovered this very long freebore/jump and am wondering if this is normal or not. I know it certainly is not for bolt rifles. I've read a few other sources (not necessarily reliable) that say the difference in freebore between these two chamberings is an order of magnitude (10x) smaller than what I'm finding. The barrel is floated, but you make a good point on the trigger - it is terrible. It is on my list to improve...as is fire lapping. Anyway...I'm still hoping to get some solid confirmation that my chamber freebore is normal so I can cross that item off my worry list. Thanks for the discussion. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.223 vs 5.56 Chambers - HUGE bullet jump?
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