|
|
Post by joe1379 on Apr 30, 2015 21:40:02 GMT -5
Well, really the second but first time I got to really try some loads. I received the new build from Richard a short time ago and am pleased with its performance so far. Hopefully my computer doesn't crash for a third time while doing this post!! Anyway, I started off trying several different bullets and powders. The 70 grain loads caused badly bulged primers that needed a pair of pliers to get off the bolt. Maybe need a smaller bushing in the plug? Others use more then this with no issues so I don't know what's up with that but obviously went to a lower charge after three of those!! Here is what I shot and the results:
46.5 grains of 4759
250 XTP------2415 , 2398 , 2415. Group was a tad more then 1/2"
275 BE-------2376 , 2389 , 2375. Group was .386. Took this one home as it was good!
70 grains 4198
275 BE------2815 , 2817 , 2821. Group was 1/2" or so but primers were bulged and stuck
60 grains 4198
250 FTX---2515, 2502, 2559. Group was 3/4". These were put through the FF die
I sent Richard the pic of the good group to post because I am an idiot and don't know how.
Joe
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 30, 2015 21:55:27 GMT -5
Check to see if your primer flame channel got fouled by the 4759 loads...that would cause excessive bulging with the 70gn h4198 load....The velocity is about 50fps higher than what I clocked with I4198 275 mh with Bill's magneto chrono in around 65 degree temp......
|
|
|
|
Post by joe1379 on Apr 30, 2015 23:30:04 GMT -5
Just took the plug out and ran a small bit up into the flame channel. It was fairly fouled. Why does that cause more bulging? Just curious. I would think it would prevent more pressure from getting to the primer. However , if that causes it then that would be the issue! Thanks for the information.
Joe
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on May 1, 2015 6:13:51 GMT -5
Are using a ventliner or bushing..?Your ventliner may be opening up also....The way I see it,the pfc getting fouled means there is less volume to absorb preesure coming back through the vent/bushing....
|
|
|
|
Post by joe1379 on May 1, 2015 7:12:52 GMT -5
It's one of Luke's new bushing plugs. I opened the PFC back up so hopefully that's it. I have the vent liner on my SMI conversion but hopefully will have a new plug on that one soon with a bushing also. The vents on that one get eaten up real quick so can't wait to be done with replacing them all the time.
Joe
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on May 1, 2015 11:09:57 GMT -5
Take some pictures of the bulged primers. Too many shoot that load without issues with the same set up as you.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on May 1, 2015 11:25:37 GMT -5
JMO, but if opening up the flame channel doesn't fix your problem, I'd look into the headspacing. Check and see how much primer you're getting into the plug and make sure that's not the problem. If you're primer isn't seated into the plug as fully as possible, that can and will bulge them.
|
|
|
|
Post by jeff on May 1, 2015 11:29:17 GMT -5
I had to open the flame channel and go to a .030 bushing. Had the same problem with Lukes plug and a brux barrel. Cured it on the savage. jeff~
|
|
|
|
Post by joe1379 on May 1, 2015 12:31:18 GMT -5
I threw them out as they were mangled from me having to rip them with pliers. Should I open the PFC a bit size more then factory or just back to the factory size? I am not sure if the bushing is an .040 or 30 either. I have to contact Luke on that one. It is the new brux/ bushing combo. As I stated in the the original post, I had the gun out one time prior and fired just a few shots of 70 grains of 4198 with a 300 APB. The primers came out fine on those and I would imagine the pressure to be greater with that heavy bullet. Hopefully it's just the PFC.
Joe
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on May 1, 2015 12:42:18 GMT -5
What primers were you using? Was the body of the primer bulged or just the cup where the firing pin strikes it? Did you restrike any primers to see if they were "sticky"? It would be very odd to have bulged primers out of a 700ml with that load.
|
|
|
|
Post by joe1379 on May 1, 2015 13:46:02 GMT -5
Yeah they were far from sticky. I had to break them apart to get them off. The whole primer was bulged and nearly separated from the primer rim. Very odd indeed. The federals were really bad with that load but the winchesters still bulged and needed to be pried out. Tried the snapping routine but there was no way these things were moving. Just hoping its the PFC causing the issue.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on May 1, 2015 14:19:55 GMT -5
Straight 4759 can be dirty compared to other powders,most likely that was the source of your issue....
|
|
|
|
Post by joe1379 on May 1, 2015 14:45:58 GMT -5
I am willing to bet you are right. Just drilled it out and when I started a 5/64 bit wouldn't even start down the PFC. Tons of crap came out of it. Live and learn. Now I know to drill that baby out after a session of 4759. We shall see if that fixed it on Monday. Thanks again everyone. Richard, where's my pic.  Joe |
|
|
|
Post by jims on May 1, 2015 15:03:02 GMT -5
If you have access to N110 it burns much cleaner and is a nearly grain for grain substitute for 4759. Just generally hard to find. I wish I had a 2 pound bottle of that.
|
|
|
|
Post by joe1379 on May 1, 2015 16:03:52 GMT -5
Exactly what Richard said!!! I will have to look for some. Richard did a great job on the gun and got it to me a week after getting all the parts. Can't complain about a gun that shoots MOA or better with about everything I fed it on the first real test run. My fault for feeding it dirty food and then not brushing her teeth Joe |
|
|
|
Post by Richard on May 1, 2015 20:46:17 GMT -5
I looked for your post last night. I know you said your computer crashed and I just fired up this one. The bolt nose to BP is as close as it can get (without binding) so it would not seem to be a head space issue. Richard  gif image hosting |
|
|
|
Post by joe1379 on May 1, 2015 22:03:09 GMT -5
No question about that Richard. It's seating them as deep and as tight as possible. It's most likely the crud as there was a whole bunch caked up in the PFC.Thanks for posting that $6 group. I have a hard time shooting a $10 one just to do it. I know she is grouping tight as can be. Next trip I will start stretching out the distance but will bring my cordless drill and a 5/32 bit with it. Joe |
|
|
|
Post by Richard on May 2, 2015 18:56:28 GMT -5
The proof will be if it can reproduce similar groups every time you go to the range (under good conditions). Hopefully it will!
Richard
|
|
|
|
Post by joe1379 on May 6, 2015 11:33:16 GMT -5
Well SML was right. I went to the range yesterday and sent over 50 loads downrange without a hitch. No bulging primers at all. Stretched it out to 200 yards with 60, 65, and 70 grain loads using FF 250 grain hornady FTX bullets and was very happy with the results. (and because they are fairly cheap!). 70 grains actually shot a .935" three shot group at 200 and two of the other groups at 65 and 60 were in the 1.5" range. I sent pics to Richard but should be able to post pics by weeks end with our new computer and my wife's help. Lol
Joe
|
|
|
|
Post by al53 on May 6, 2015 13:59:04 GMT -5
glad it worked out for you...post like this are very informative and helpful for others in case they get in the same situation...and from the sounds of it you were shooting good...the people here are a vast bank of knowledge;.I have learned so much just from reading..it helps when you actualy get your rifle and get to shoot the first time ..you look back at what every one was explainibf and tips and tricks...thanks all
again glad your problem is solved and sml had the experience prior to you and had a cure for you problem
|
|
|
|
Post by Richard on May 6, 2015 16:31:46 GMT -5
|
|
|
|
Post by joe1379 on May 6, 2015 17:01:22 GMT -5
Thanks for posting those Richard. Yes the first pic is my first group at 100 yards and the lower shot was first shot. The 200 yard groups just got tighter and tighter as the charge increased, ending with that 70 grain charge. Next time out I will go a bit higher with the charge, maybe to 78 , and see if they get even better. (75 deg/ 55 percent humidity/ s wind at 11 mph)---conditions the day I shot these. I know many here have shot better groups then these but I am tickled with this gun so far. Thanks again to Richard for putting her together and to all of the members for the great advice and information posted here. Cheers
Joe
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on May 6, 2015 20:49:46 GMT -5
Glad she didn't foul up on you again...congrats on the fine groups...
|
|
