Forum Replies Created
- January 26, 2017 at 6:27 pm #33011
Only one with a bullet I cast, and I didn’t even get the fun of shooting it. SIL used my 30-30 with a 170 gr Lee bullet, COWW+2%sn. I don’t remember the exact load, would have to go look in the log book. But it was a young spike and it went through like it was a laser beam. According to him it took about 3 leaps and folded up.
- January 26, 2017 at 6:09 pm #33009
I was using imr 4350 for the xcb, and have just been loading 5 rounds per load to try to narrow down a good load. 49.2 grains with Dacron (1.2GRS) gave me 3 that cold be covered with a quarter but the other 2 were about 2 inches from the group. Average velocity was 2355. Then I jumped to 52 grains and ended up with the much larger spread, no real group. Average velocity 2505 fps. I am still going to buy a mold this month, I just need to keep my feet on the ground and realize HV isn’t going to happen accurately with this rifle. On the other hand, that C-312-185-1r that you mentioned one time will cut the bullseye out of a target with a ten round group at 100 yds with 34grs of 4895 and some of that “magic dacron”. Again, 1.2 grs. I seem to have a talent for pulling off exactly that much and laying it on that Frankfort Arsenal scale. I have a Remington Sportsman 78 in .270, I might look at having Tim put a 14 twist barrel in 30cal on it and going in that direction.
- January 25, 2017 at 8:53 pm #32996
Larry, just out of curiosity, what load would you recommend for a 30xcb in 30-06 with a 10 twist barrel? I have a few that were given to me to try out and I have run them up to 2505 fps, but the accuracy wasn’t great, about 3.5 ” at 100 yds. I was using imr 4350 in my 03a3. I am torn between going for more speed and backing it down for the accuracy. Do you think I can find an accuracy node a little faster with this twist and bullet? And do you think a little dacron would help?
- August 30, 2016 at 4:37 am #29753
Nobody ever accused liberals of being overly bright except the one liberal patting himself on the back and telling himself how smart he is.
- August 30, 2016 at 4:34 am #29752
I think I have found the load I am looking for. I ran 10 each of 32grs., 33grs., and 34 grs of 4895. The 34 grain load had 7 out of 10 in a spot just a little larger than a quarter. The three that were outside the group were about 3/4″ to the left, ad 2 of them made just one oversized hole. Also I used BLL for lube. Nice clean shiny barrel. I don’t have access to a chrony any more so I have no idea what the velocity is on these. If anybody has any data or even a good guess as to the velocity I would appreciate the info. Man, I have got to get a photo hosting site set up, I am so excited by some of these groups with cast that I really want to share.
- August 29, 2016 at 11:33 am #29735
One of the things that seems to be over looked a lot is consistent alloy. When I was just adding “a bit of solder” to my wheel weights or range lead I had a lot more variation. Then I was reading something about SN and SB affecting as dropped weight from a given mold, and it clicked. Nowadays I make alloys in fairly large batches ( for me 60 – 100 lbs) and use only the same batch for the run of bullets. And I keep a serious amount of notes on everything. I am also wondering how much effect ambient air temperature affects every thing, just got a thermometer for the shop about 2 months ago and started keeping records on that. Not enough data yet for a SWAG, maybe a year from now. My shop is starting to look like and office with tools, LOL. But anyway, mixing alloy in batches and not just sweetening the pot for “castability” made a big jump in consistency. FWIW.
- August 29, 2016 at 12:51 am #29730
Larry, you pretty much covered why I was weight sorting. I am trying to work up the most accurate load possible with rifle/bullet/powder combination. By eliminating as many variables as possible the results should be more consistent. I even shoot the same batch 3 days in a row to eliminate the human variable as much as possible. In other words I ain’t good enough that I don’t have off days on the trigger. And out of the 150 bullets I sorted I only culled about 6. And .3 grs. is closer than a box of SMKs. I know many people that even weight sort them.
- August 27, 2016 at 4:19 am #29699
Tim, most of my boolits nowadays are +/- .3 grs. as cast. Not all, I do have bad sessions. After I put the checks on and lube them I like to kind of double check the weight. I guess I get a little obsessive sometimes. But at least I am not doing the full 3 grain or more variation like I was when I first started. I checked some .230 gr. 45’s that I did when I first started and was shocked at the difference in what I had thought were good bullets. Some had a full 5 grs. of difference. Priming the spout and consistent timing and temperature are the main things for me.A big school room style clock with a second hand right behind the pot has been a major advance in my casting. And if I had never read your article I would probably still be trying to figure it out. Thanks for all you do.
- August 26, 2016 at 1:08 pm #29695
If it hadn’t been for Larry’s article about that bullet, I wouldn’t be trying it. And thanks to Goodsteels article on casting consistency I have been using+/- .3 grs as a weight sorting standard. Very few culls at that level and most of the variation appears to be after dressing them. They are sized to.311. I guess I should just quit whining and enjoy shooting them, but that desire for better is a strong force. Other than that, my main thought is that if I can get the groups tighter at 100yds I will have less problems with linear dispersion at longer distance. I guess my first step is going to be working a ladder by .2 grain increments until accuracy drops or leading occurs and go from there. Trying to get surgery scheduled on this torn rotor cup, but it seems Medicare and the VA have a lot in common. Well, actually, I think my first step is going to be the dacron, then the ladder. At the very least I get to enjoy this 03A3 some more.
- August 25, 2016 at 5:11 pm #29686
Well dang! I thought I had that picture thingy figured out. Back to the drawing board. I guess I shouldn’t be too dissapointed, the bullseye on that target is 2″x1.5″ and I had 8 out of 10 in the orange, but it still gives me a 2″+ group size. And I really want to fine tune to a 1″ group at 100 yds. Not sure about the velocity, load is only 30.2 grs of 4895. How high can I go with this powder?
And just out of curiosity, can anyone see the picture?
- August 25, 2016 at 3:57 am #29678
I tried it again this afternoon, nearly identical group, first shot slightly high and right again. Pulled out my dope book and changed point of impact 47 clicks, back to j-word setting. Ran a brush and a couple of dry patches through the barrel. Shot 6 rds of my SMK load over 53.5 grs. of Win 760.Got a group slightly less than an inch, just about 7/8″. I realize the groups I am getting with cast would be adequate for hunting at 100 yds. but I really want that tight group. What should I do to tighten this load up? Dacron? Change lubes? Using White Label CR has been leaving a nice shiny bore.Also, I am running the boolit right up against the lands, seems to be the best with cast from what I have read. And I just realized that that target looks awful big in the picture, but it is a 12″x18″ sill-wet. Am I crazy to be looking for j-word accuracy from cast?
- May 12, 2016 at 2:11 am #27767
Thanks Larry, I see several things that will improve my brass prep.
- May 11, 2016 at 12:15 am #27740
Larry, I was wondering if you could post your techniques for brass prep. Obviously what you are doing works extremely well and maybe we could identify short comings in our methods. Thanks, Jack
- May 11, 2016 at 12:05 am #27738
I tried out the 13 grs of 700x this morning, got about a 4″ group at 100yds. And several of the out lying rounds were definetly my fault. I believe this will work for a low velocity practice round. Of course I am going to save my #2 and go back to COWW and SN. The neatest thing about today was that right after I got done shooting I started to walk down and check the target. There were several does starting to cross my shooting lane. I just left them looking at me as I turned around and went back to the bench. Did not want to spook them too much. About an hour later went to check the target and had a big gobbler run across the path in front of me, about 15 yds. Always a good day when the wild life is around. It is super great being able to work up a new load and step out into the back yard and test drive it. On the downside for today I tried to practice drawing from concealed carry with 1911 a1 and found it really lights up this shoulder. Oh well, win some, lose some.
- May 10, 2016 at 12:15 pm #27724
The fact that every rifle has its own preferences and the ” mad scientist” factor make this a really fun hobby. Constant experimentation and striving for better results, what more could you ask for?