Just put together a new 24" bull barrel upper. Has rifle length gas system with standard lo-pro block. Took it the range today to sight in and had some issues with it. I got it on paper with Remington 55gr fmj and it did fine. I then switched to some hand loads to zero and work up a load for it. It short stroked every hand load I put through it. Some times it would eject the spent case and some times it would not. It would never cycle the bolt back far enough to grab a new round from the mag. Even when I worked up to max charges it would still do this.
The load work up was Rem brass, XBR and 75gr HPBT. Even when at 23.8gr, I still had to manually load every round. Also, 23.8gr was the only charge that shot good, but I started to get ejector marks on the brass at 23.5gr. Every other .223 I have likes this combo somewhere between 23.5 and 23.8gr without any pressure signs. This is the only barrel I have that has a Wylde chamber if that matters.
Will an adjustable gas block add more gas to cycle the action while decreasing the pressure?
Any help would be great.
thx
The load work up was Rem brass, XBR and 75gr HPBT. Even when at 23.8gr, I still had to manually load every round. Also, 23.8gr was the only charge that shot good, but I started to get ejector marks on the brass at 23.5gr. Every other .223 I have likes this combo somewhere between 23.5 and 23.8gr without any pressure signs. This is the only barrel I have that has a Wylde chamber if that matters.
Will an adjustable gas block add more gas to cycle the action while decreasing the pressure?
Any help would be great.
thx