fireball brass problems
Posted 17 September 2011 - 08:47 pm
After problems started, did you try a new batch of brass...?
Is the gun a factory standard chamber, or a new custom barrel maybe... with tighter spec throat....?
is the brass has been fired alot in another rifle you may start to notice the bolt etc, difficult to close, as the brass is flowing to fill the difference in throat dimentions..
this will require a shoulder bump die...
Have you checked concentricity of the brass itself...? As this would cause major flyers....
concentricity of the bullet head itself before loading...?
Are the primer pockets enlarged...? does the primer seating feel like you need a differing pressure to seat them in various rounds...?
have you done a good copper cleaning regime of the barrel, as well as carbon build up...? as both build up in layers...
Are you keeping firing protocal adopting the same position, eye relief, etc... clear sight picture...?
hope this narrows the trouble shooting down a bit, sorry no pun intended....lol
Posted 17 September 2011 - 09:47 pm
when i first shot the rifle the primers had puddling , i phoned the armoury at edgar brothers and they sent me an e mail saying this was normal from remington but the primers bulge when fired and the bullet rocks when stood up.the fired length is a wopping 1.4060 to 1.4100 . when the trim length is 1.4000 this is quite an enlargement and could cause problems if the brass is now longer than when i first got it.basicly the primers are making the bullet longer which would cause the damage i am seeing
Posted 18 September 2011 - 07:11 am
Posted 18 September 2011 - 07:38 am
Posted 18 September 2011 - 09:31 am
Posted 18 September 2011 - 11:29 am
Posted 18 September 2011 - 12:05 pm
Posted 18 September 2011 - 01:38 pm
Posted 18 September 2011 - 02:20 pm
.6 is a BIG jump in fireball powder ! .3 is the max recomended increase in one jump, i use 16 gr of h4198 but have been to 16.9 gr but got all the signs of pressure flat primers and lenghtend case's.
When someone did a quick load on 16.9gr it came back as a dangerous over pressure load so look at all avenues and don't take the reloading data as gospel.
Posted 18 September 2011 - 02:39 pm
Assuming you've checked the scope, rings, mounts, and rifle/action bolts etc and all is well then it could be one of several things. I shoot a 17 Mach IV and make all my own brass from .223 ( I need to get a life) so I know a little about getting these things to shoot.
Chamber length you can measure VERY accurately with a gauge that fits in the chamber neck ( get a mate with a lathe to machine one up). Its a "T" shaped button that butts upto the end of the chamber and slides into the case when the bolt is closed.
Trim a case neck down be 3mm too short and chamber the round.If it chambers and is still a little stiff at the bottom of the bolt stroke then its likely that the shoulder needs a bump back by a thou' or two. Having said that a little stiffness is OK as this helps set up head space. With the gauge you can determine the overall length of the chamber. Trim cases back between 5 and 10 thou from OAL.
Make sure the barrel is clean. These things will foul out quickly. I couldnt keep 3 shots inside a 12" circle at one point due to copper build up!Use a good carbon and copper remover. Get yourself a Pro Shot rod and a decent brush. They recon cleaning about every 20s round or so. Have you tried waxing? I tried WS2 coating the bullets but had little success and moved to waxing ( not my bikini line!). This put 3 pills virtually thru the same hole at 100 yds and increase the number of shots between cleaning cycles. Im in Notts if you still having probs then shout up! Also check out Saubier.com-- its a small calibers haven!
Posted 18 September 2011 - 05:13 pm
thanks for your thoughts,my main concern is the damage to the end of the brass.with regard the action bolts the touque is about 8 inch lbs so to be honest i am just nipping them up tight as finding a tourque wrench from 5 inch lbs is hard and i considered this the least of my worries at the moment but your thoughts on how much accurate tourque settings need to be would be interesting.
head space i have never got into as i thought it was only inportant if you were trying to seat your bullets further out to cut the bullet jump down.i'm probably wrong.i thought that trim length was a standard length all rifles were desighned by.i'm wondering if my bullets are bouncing when fired so they need to be longer but that would mean when i buy new brass the shorter ones will produce flyers.i would not like to trim more off than i have to rule out the brass bieng to long.when ytou say trim back 5 - 10 thou back from the overall length waht if this is out of sami spec?i thought that was a no no.
waxing is interesting but i need to get back to basics i had it shooting on a five pence and for the good of my mental health i need to find out what went tits up.
i will not hunt unless it is spot on and the f*****g rabbits were sat there watching me shoot this morning .b******s sorry about that little outburst.
thanks to you and all the other guys who have helped i'm going on you tube to learn more about oal
Posted 18 September 2011 - 06:09 pm
i'm going on you tube to learn more about oal
If going on U Tube a good idea would be to follow the teachings of Ammosmith - his vids are excellent
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