I've been shooting my M-305 for about 4 years.. The first shot a lot of times shoots 3-4 inches high and then the rest of the shots go in a nice little group below it.. I find I can minimize this effect by making sure the bolt is back as far as possible when chambering the first round and releasing it so it slams in nice and hard.. this works most of the time, but not always.. I've had loads that group under 1", except for that first shot being approx 3 inches up.. has anybody else had this problem? Is it just the Norincos or do the springfields do the same thing? I haven't made any mods to this rifle except for a US GI stock that i put on it..
Norinco M305 first shot flyer
- Thread starter valmet762
- Start date
- Location
- big sky country
Often clean bore shots (the first one or two) will group differently.
I don't think its that uncommon.
I don't think its that uncommon.
My first thought was that the bolt being cycled manually should not matter because it is either locked up or it isn't.
But then you said that you can minimize this effect by holding the bolt back & letting it slam forward.
I am not an expert on rifles but my first thought was that your first shot is from a cold barrel & that might cause it to be high. Perhaps also a bedding issue.
Let's see what others have to say as this is interesting.
But then you said that you can minimize this effect by holding the bolt back & letting it slam forward.
I am not an expert on rifles but my first thought was that your first shot is from a cold barrel & that might cause it to be high. Perhaps also a bedding issue.
Let's see what others have to say as this is interesting.
i first thought about the cold barrel shot and the clean bore thing as well, but it was easily eliminated by some experimenting at the range.. The rifle is scoped and zero is 200 yds.. I've done enough shooting with this rifle so that I know to hold low for the first shot (1/2 mil dot at 200yds).. but because it varies a bit by the way it chambers, its not alway predictable.. the gas plug is tight so I dont think that has anything to do with it.. does anyone know where I can get instructions on properly bedding this rifle?
PULL THE OP ROD HANDLE ALL THE WAY BACK and RELEASE IT ...
riding the cocking handle slows the feed cycle for the first shot, which can cause that first round flyer out of a cold barrel to fly even further,
and also may even cause extra wear on the op rod tab.
LAZ 1
riding the cocking handle slows the feed cycle for the first shot, which can cause that first round flyer out of a cold barrel to fly even further,
and also may even cause extra wear on the op rod tab.
LAZ 1
that's exactly how I release it.. when I release it that way most of the time it's ok, or not as bad.. It's pretty consistent with the first round out of each mag.. doesn't matter if the barrel is cold or hot or clean or fouled. its puzzling because once that first shot is out, the groups are in some cases, with certain reloads, sub moa.. i'll try and dig up some old targets and post them..
the stock ferrule and barrel band tension seems ok.. it's not to tight or loose.. is there any way to check other than eyeball or feel?
I did some checking on the stock and barrel band and found that there actually was a bit of play in that area of the stock.. I never noticed it before.. but I found if i squeezed it while holding the barrel and the stock just behind the band , there was a bit of play there.. I shimmed it to make it nice and tight.. going to the range saturday to try it out weather permitting.. if this makes a difference maybe bedding is the next step.
went out to the range yesterday.. fired off a bunch of rounds... looks like tightening the stock seemed to help quite a bit.. shot a couple of groups at 100 yds both under 1" and 2" and under at 200 yds.. first shot was not high at all.. I think i got 'er fixed.. thanks guys
