|
Post by mosigdude on Feb 11, 2015 23:59:19 GMT -8
Very good to know and Thank You! Crimped primers I am equipped to deal with, I just wondered what I was starting with on the pull-downs if I didn't punch out live primers first.
|
|
|
Post by mosigdude on Feb 12, 2015 21:46:08 GMT -8
The Federal pull downs I have from RMR are marked AR on the primers. That corresponds to the Federal Gold Metal Match # GM205MAR primers. These pull downs also have a crimp on the primers. So you will need to remove the crimp by swaging or reaming. Glenn Glenn, Not challenging anything you said and just adding info since others are likely to reference this in the future. Today, just on the off-chance that they might know for certain, I posed the same question to RMR regarding the primers in the pull downs. They responded that they thought possibly CCI #41's but were not certain. Possible the pull downs are from different original loads and possibly have both, either mixed or from lot-to-lot. I know the #41's are relatively hot, similar (if not identical) to the #450's except with a slightly harder cup. I'm not sure how the heat of the Gold Metal Match compare since I have no experience with those. So caution may be necessary if they vary considerably. I've never seen a marking on a primer (and I was likely just not looking), where is the "AR" marking that you were talking about? It would be nice to be able to sort them if the brass does happen to have a mix. Cheers, Tim
|
|
|
Post by geepee3 on Feb 13, 2015 3:44:48 GMT -8
No worries Sir. All the FC pull downs I received have primers marked like this. If your not sure your going to get the same. Then it is best to wait and see what you do get. Glenn
|
|
|
Post by GLSHOOTER on Feb 13, 2015 5:52:57 GMT -8
The ones I have handled had the AR on the primers. Reports from the guy shooting them are that he saw nothing differnt per se in how they shoot. These were military contract so I suspect that they wil mostly be all the same given the lots but as we all know things change...LOL
The price is right so the crimped pockest are just a mild nuisance.
Greg
PS: If I didn't have a barrel in hand I wouldn't be do anything toward making up brass before it got there.. I'd rather fit it to start than have my shoulders back more than neded or worse yet not back far enough.
Also don't trim below 1.620 on cases you just made up. They will shring to about 1.615 on their own when they form out completely. NOtthatshorter is all that bad but neck lenght is one of the design parameters we worked with onthis one for concentricity on bullet seating and tension.
|
|
|
Post by mosigdude on Feb 13, 2015 22:46:38 GMT -8
This does make sense, waiting to set up the brass until the arrival of the barrel... as much as it pains me to contain the excitement to do so. I guess i'll find some other busy work to do until then.
One thing I was thinking about, and I know you somewhat addressed it, with the Herrett dies being set above the shellholder, what portion of the brass does not get resized? Has this caused any issues that would warrant a custom set of dies made to full length of the case? Any feel for the number of loadings you've had on a single piece of brass so far?
Also Glenn, thank you for the picture, I am certain I have not handled this type of primer before now that I see the pic so it should be obvious if I have the same!
|
|
|
Post by GLSHOOTER on Feb 14, 2015 5:44:17 GMT -8
The short die causes no problems. If it did you could gut a 6.8 die and size the body with it. Run it back through the Herrett rig and expand the neck as it will be sized down slightly. No big deal at all.
You can get one firing if your crazy or six+ if sane. I have some 6X6.8 SSA that has over 12 firings on it. The A-30 won't be any different. I have a large batch with 6 loadings on it right now actually fired in the A-30, all FC BTW, and am happy with it.
Greg
|
|
|
Post by mosigdude on Feb 14, 2015 11:30:42 GMT -8
I hadn't thought of that solution (well, not really a solution if there isn't a problem) but that does make perfect sense! I'm building this as a hunting rig so brass life isn't paramount but I also load pretty conservatively so repeated loadings on the brass would be an added bonus.
Ok, I have no more questions floating around in my head at the moment (give it time, I drive around for 12 hours at a time at work with, sometimes, nothing to do but think) so I will again say thank you Glenn and Greg for all the info. I promise to repay all this badgering with some load-workup posts when the hardware arrives!
Cheers! Tim
|
|
|
Post by mosigdude on Feb 15, 2015 2:51:56 GMT -8
Ok, it happened, I thought more but didn't have enough info to answer my own question.
After digging around it looks like I may have other 6.8SPC-based calibers in my future so I'll probably end up with a Redding S Bushing Die set for that caliber anyway. Can the A30 be loaded up with either the neck sizing S-Die or the full-body S-die for 6.8 with appropriate bushings or will those die bodies be too long?
|
|
|
Post by geepee3 on Feb 15, 2015 5:26:13 GMT -8
Most semi-auto rifles don't work by just neck sizing. Although I know of a gentleman in the M14 forum that has a Socom 16 that he can because of an odd chambering. Also, the American 30 chamber has the 30 degree shoulder of the 30 Herrett. After the first firing the case takes this shape. The 6.8 SPC has a 23 degree shoulder. Check out the two cases below. Fire formed American 30 SSA brass, left. Resized SSA case ready for first firing, right. The first firing increases the case capacity too. So while it may be possible to resize with the Redding type S bushing die. Your going to over work the shoulder and decrease the case capacity. If I have gotten anything wrong I know Greg, or the other BHW staff will correct me. Keep safe on the road. Glenn
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 15, 2015 6:06:37 GMT -8
Ok, it happened, I thought more but didn't have enough info to answer my own question. After digging around it looks like I may have other 6.8SPC-based calibers in my future so I'll probably end up with a Redding S Bushing Die set for that caliber anyway. Can the A30 be loaded up with either the neck sizing S-Die or the full-body S-die for 6.8 with appropriate bushings or will those die bodies be too long? The American 30 is the only 6.8 based cartridge that Black Hole makes that CAN NOT be loaded with the Redding "S" die. Of course this is the only one in the family with a 30* shoulder. Black Hole prides its self in using dies you can buy off the shelf for all their wildcats. That being said, use a 30 Harrett size die and the gauge supplied with your barrel and enjoy.
|
|
|
Post by GLSHOOTER on Feb 15, 2015 6:13:25 GMT -8
Basically you have it right. Now for the emphasis. First off NO NECK SIZING FOR AR15"s... PERIOD
Nuances. The hole that the neck goes up in on the 6.8 SPC dies may or may not be big enough for the case to go up into. I just droped a sized one in mine and it would not enter the hole. There is some variation in dies but not one I would bet on. This is what prevents a guy from using 223 dies from loading the 25X45 SHARPS. I load 6X45 on mine all the time but they are just too tight.
I recommend geting a Hornady Head Space tool with the 350 insert so you will be good to go once the barrel gets there. Also a way to check distance to the lands is very helpful as they can vary a great deal with different bullet shapes. One length will not do for all on these. Get the Sinclair it is far superior to the Hornady as you don't need special cases.
Greg
|
|
|
Post by mosigdude on Feb 15, 2015 11:09:39 GMT -8
Ok, my curiosities are again satisfied, Thank you, I owe everyone a beer or ten. I already have the headspace tool/insert set and have the ability to make my own specialized cases for the Hornady OAL guage (I long ago would have bought the sinclair but couldn't find it in stock for several months so I eventually purchased the Hornady tool and a drill/tap to make my own cases) so I think I'm good to go on that.
I think I have done all I can until I get the barrel, I will just silently stir until it arrives.
I look forward to seeing any progression others have until then.
Cheers, Tim
|
|
|
Post by GLSHOOTER on Feb 15, 2015 13:45:59 GMT -8
Making your own gage pays off. I have done that for years. Ritch convinced me to get the Sinclair. I did and I smiled. Lay with bullets and powder and get ready to have some fun.
Greg
|
|
|
Post by mosigdude on Feb 16, 2015 18:12:33 GMT -8
I had the day off today so I scoured the 'net and a few local shops for projectile availability. I think, for my purposes, I'm going to try to make this work with the 150 grain stuff first and then default to 125's if I'm not satisfied with the numbers I get from the 150's. From past experience in other 30 cal, I think I'm going to try to run either the Nosler 150 Ballistic tip or the Hornady 150 SST with preference to the former. I know you haven't published groups on everything you've tested but have you had any experience, good or bad, with either? Also a little curious on the Berger Hunting VLD in 155gr but that one isn't too high on my list unless the others are a no-go.
|
|
|
Post by GLSHOOTER on Feb 16, 2015 18:25:16 GMT -8
125 Accubonds have done well. We have concentrated on the Pro Hunter flat based 125 & 150's. I've not looked at the Bergers. My big push this next go around will be some 110 VMAX as the BC is very high. When you get some results be sure and post it up. Sharing on this will be great.
Greg
|
|