to lynn

[cheek9075]

lynn
i finally got a chance to shot. weather has been a killer for the past 2 months. i put new davison bases on my rifle, along with kelby rings. i started load at 27 gr n-135 with 90 gr berger. started with oal 1.730 using comparater. shot 5 round groups. going up .3 gr every time. went too 28.4 gr and bolt started getting tite. nothing really impressive 27 and 27.3 where the best. after i reached 28.4 gr i loaded 10 more with 27 gr and 27.3 gr. the first time a shot 27 and 27.3 it shot the best out of all i shot, but when i came back to it, the group opened up and was no good. still do not know what is going on with it. looking a this site loads are going into 30 to 31 grs. am i not loading hot enough.
how do you know where to start seating depth. how do you find where the bullet starts meeting with the lands. i know that that is where i should start trying to develep a load, but how do you find out where that is..

any help please

 

[expiper]

Hi Johm and Lynn...just saw ur delima....in my chamber with .080 fb I load 90 gr Berger bullets at 2.325 over all...,,that is the problem with giving dims. with a comperator or "nut" or what have uuu--they are all different..))..this is the actual tip of the bullet...,,oooo yea they vary a lil ...but close enuff to get u started...)).....how ever much different your reamer is from .080 shuld be added or subtracted to get a "close" place to start,,maby add aprox .010" or so for jam))...and as Lynn suggested switch powders....135 is not optimum for 90 gr bullets in your particular cal....
Once you get the bullets touching the lands and see the lil square mark ..you are ready to get somewhere...Roger

 

[cheek9075]

i am using a sinclair comparater. i put a 90gr berger in a fired case. ran it into the camber it was 1.973 inch. i loaded 5 rounds at 27 gr. n135. when i put loaded round in, i didnt fire round but worked bolt to remove case to to see what it looked like... the bullet was stuck in the chamber, i used a cleaning rod down the muzzle to get it out. looking at the bullet, it had marking on it, long marking, final seating depth to start with was 1.735 inch. here's the funny thing. 27.3 shot good. about 3/8 inch first 5 rounds. i went up to 28.4 and the bolt started getting tite on the eject. so i stop. looking at groups the 27.3 gr was the winner. so i loaded 5 more a the same depth. it shot 5 round groups in a 3/4 square. almost perfect square. tired it agian. samething.
i have picked up on something. my 22.250, factory chamber, with a fired case i can "slide" a bullets in the case mounth with ease. almost no grip on bullets. i am sizing them with full length dies. with a fired case from my 6mm bullets are "hard" to put in a fired case. after i stuck one into the lands i started looking at why. loaded ammo in my 6 br is .268 inch with a .269 chamber. could i be back to this problem. only way to find out is to cut some down. what i don't understand is why i get one ok group and then all to pieces.

 

[expiper]

oooooooo ....stop rite now...if your chamber has a .269 neck it requires the case necks to be turned slightly...you are flirting with disaster if you dont turn em....just a clean up cut...but it has gottaa be done....you want the loaded round to be no bigger than .2675 ..that give you 3/4 of a thou all the way around...smaller will work ..but absoulutely they have to be turned.....your pressure culd skyrocket....Roger
PS,,,others please chime in here...he prolly thinks I dont know what I am talkin about....,of course he aint the only one..haha)

 

[cheek9075]

roger,

i know what you are talking about, and i have turned them. chamber is .269 to .2695. LOADED AMMO is 2.675 to .268. i was told eariler in another forum taht it loaded ammo at .268 was to tite, but lynn said ok try other things. ok, so is it to tite or not.

 

[AckleyImproved]

STOP..... You must neck turn the cases before you go any futher! Any ammo that is loaded, pull it.

With a 0.269NK, your loaded rounds should be measuring 0.267", so you need to turn a bit off them. Then use a 0.265" bushing.

Other option if you do not want to turn is to have the chamebr openned to 0.272".

CHeers
AI

 

[cheek9075]

ok now we are getting somewhere. guessing.... that is why i bullet into lands was so long... brass still had to much grip on bullet and it did not go back into case... and that is why i am seeing bolt thurst a 28.4 gr of powder, which is 2 grains or more less that max accoring to berger load data. that could be the whole problem.

 

[expiper]

The fact that they are too tite is why your groups are bad...you get one with clearance and shoots normal ...then one too tite!!and the pressure is excessive or different....if you get just a lil pocket fuzz in there you will blow the cas up and your gun and YOU>>>>...I am usually VERY dareing when it comes to using lots of powder and lots of pressure...but this is something that is un-controlable...very dangerous....listen to the others...I know that Lynn didnt realize how close you were on your clearances....you say the neck is .269....and the brass is .268...dont temp fate...turn em a lil or as AI suggested get the neck opend up a lil to .271-.272...then all will be well and your groups will make you smile....Roger

 

[cheek9075]

thanks for that.. i will cut some down so hat loaded ammo is .267.. then it should work.... hopefully.... you said you use n540. berger does not list that for 90 gr. got an e-mail from them. where are you at on n-540 . and where did you get you data.

 

[expiper]

I use aprox. 33.3 gr ...of 540 with a 90 gr Berger....that is a finish,max) load ...not a starting load...your bbl may shoot a lil different...I wuld go down 1/2gr and then come back up...There is NO published data that you can believe...I have shot this stuff over and over...there is no better data than that from these guys on here who compete . Just use a lil reloading discretion....and dont load hundreds of em till you know where the top end is with your particular combanation!!
Roger

 

[cheek9075]

THANKS AGIAN. I WILL CUT SOME DOWN AND TRY AGAIN.

 

[cheek9075]

my barrel is a 1:10 twist.

 

[cheek9075]

ok out there. what powder, i have on hand, varget, n-135, h4895, blc 2, h414, h380, and very little n540. powder is getting hard to find. i have about 200 fed 205 left. i have some remmington small rifle and some cci small rifle. whick powder out of the one i have would you try. i have all ready tried n540, and had the same results.
has anyone out there tried wolf primers? any luck with those.
berger ballistician says n-135 start for a 90 gr is 27.5 and max at 30.4, varget start 27.5 and max at 30.7
this rifle will shot good groups. i have had one good group with it. just can not get it to shoot agian.

 

[cheek9075]

lynn
had snow and ice this weekend. didn't get to shoot it yet. giving good weather on sat and sun of this week. hope to shoot then.i did load some though, loaded ammo messured .268inch. talked to gun smith today that cut the chamber, he says chamber is .2695 inch. nothing i loaded messured over .268. i should have aleast .0015 inch clearance, which should be ok. cleaned all my brass. brass is messuring .002 inch longer than factory. i do not have a trimmer for 6 br yet. going to get one this week to make sure that isn't the problem, but i don't think it is. it all is 1.560to 1.561, which i think is .002 long. fact. should be 1.559. i loaded them to 1.740 which is a good .010 into lands. also loaded some new brass. never been shot. it all has been cut to .268, that should tell me if brass length is the problem.

 

[cheek9075]

lynn
alright shot rifle. ended up at 31.6 gr varget. i finally got group at this load. i had to trimm cases down an other .001 inch. loaded ammo now messures .267 inch fired is running at .2685. chamber is .269. everything i shot with cases at .268 loaded, was no good. i started loads at 29.5 and i had primmers trying to leave primmer pockets. i fired 2 rounds at 29.5 and decided to try something else. after i trimmed cases down, everything came together. final groups are in the 1's at 100 yards. and high 1's at 200 yards.

 

[cheek9075]

my buddy shots a .269 chamber. same remmer that cut his cut mine. he's shoting a 66gr bullet in 1:14 twist, not supposed to shot that gr pf a bullet, but it does. it is the berger low drag, 32 gr n-135, with fed 205 primmer. his loaded ammo is .268.
maybe my chamber is a hair smaller, don;t know but it shots. like it is.
what is the "standard" space that is required or that most people try for?
that is the only thing i changed. didn't even have to adjust setting depth . .010 into lands. seems to work good. thanks fpr all the help. i learned alot from you. stilling learning some of the tricks though. i guess it is a ongoing learning experence. what works for one riflr doesn;t work for all.

 

[cheek9075]

i have ordered a custom 50 bmg. upper for ar lower. have not got it yet can't wait though.

 

[cheek9075]

the guy making it is redesigning the muzzel brake. people said the last model was a killer, compared it to 375 h&h mag. this new one they say is like 243 or so. can;t wait. order a 26 inch barrel, guy said he was working on 24 in right now and starting on 26 end of month. i should ihave it buy end of march. what brand or dies are you using? i saw lee has come out with a 50 bmg kit for around $200. any thought on it?

 

[cheek9075]

guess i will just get the lee kit to start out with, i need the press anyway. i have nothing for it yet, still need brass and powder, and everything else. big money to get project up and going.

 

[cheek9075]

lynn
back to the range, attch are some pics. of targets. decide to try adjusting seating depth. also tried n-135, i think varget did better. targets are 5 shot groups at 200 yards. bullet hole to left was already on target. it is a 30 br. i think you can tell difference in size.