6.5 156 EOL
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SnakeRiverEric
Well-Known Member
Checking if anyone has tried Retumbo yet with the 156 and 6.5x284? Next week I will
be trying them. Hope to try RL23,RL26,Retumbo. My Cooper m92 has 24" barrel and it like RL23 with the 140 EHs. Did anyone get Berger's load data for this bullet and the 6.5x284. They never responded to my request, first time.
be trying them. Hope to try RL23,RL26,Retumbo. My Cooper m92 has 24" barrel and it like RL23 with the 140 EHs. Did anyone get Berger's load data for this bullet and the 6.5x284. They never responded to my request, first time.
I love this bullet! Gave up trying to make them work in my short throat 6.5x284N (im over this barrel!), but for about 180-200fps lower velocity, with excellent accuracy, they're pretty awesome in a 26" Creedmoor barrel, with Peterson SRP, Fed AR Match primer and settled on 40gn of H4350. Found a few seating depths I like today, (cbto)@2.184"-2690fps, @2.164"-2680fps, @2.159"-2684fps. They're all a light "sticky" in 80F temps, but should be fine when 2nd deer comes in late October. Time to test at distance now, to see if they hold up?!
I did RL17 also, it was more velocity, but it was even more "sticky". got some RL16 and H4831sc, to try out also.
swd
Member
I have a 6.5x55 Ackley I built for F Open. I won our 1K Open match last weekend with the 156's. I haven't finalized a load yet but they are very easy to work with and insensitive to seating depth. I'm using RL23 for the temp stability and the burn rate is very appropriate for the case. 7.5" Brux. Here's rough 100 yard development.
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swd
Member
2845fps. I get sticky lift at 2960 which is right where another node starts to tighten up. The throat is a little on the short side. I could easily take it out another .150" and probably shoot that node. In two weeks I'm going to try another load at about 2890 which showed promise and see how that does at 1K.
Grey
thanks for the info. You can't wait to try some 156s and RL-26 in my 6.5x284
codyadams
Well-Known Member
Found something interesting with my .260 AI.
After my initial OCW load workup, I took them out to the desert for some practice at range and noticed some significant verticle stringing at 1100 yards, about 12" up and down, but less than 2" of windage, as it was a dead calm morning. Shot a 5 shot string through the magnetospeed, and 50 fps ES. DANGIT. So I did what I should have in the first place, and ran a ladder test, going up in .2 grain increments across a charge range that it seemed to like
When I did load developement with the 147 eld-m, and first switched over to Peterson small rifle primer brass, I did a primer test. I got the most consistent velocity with CCI BR-4 primers, so naturally that is what I started with.
In my ladder test though, I decided in addition to the workup with the BR-4's, I would throw in the same load workup using cci small rifle magnum primers. I thought, just maybe, the heavier bullet needs more ignition.
Well when I chronoed these loads, sure enough, the mag primers made a huge difference. Velocity was much more stable, and for some reason, loads with the BR-4 primers of similar velocity would exhibit some pressure signs where the mag primers would not. Just overall much better with the mag primers.
From 48.6 to 49.4, there was only 16 fps extreme spread, an S.D. of 7 and the average was 2920 fps and showed no pressure. So, I loaded up 6 of those and went to the range to see if they would also group well, as my ladder testing was inconclusive as far as groups, the magnetospeed bayonet kills accuracy in my rifle. They grouped under half MOA, and I wasn't the steadiest, so I called it good and loaded up 20 of them, opened up the tips with a .030" wire drill bit, and later today I am going to go test them on pronghorn, as it is opening day of doe/fawn season!!!
After my initial OCW load workup, I took them out to the desert for some practice at range and noticed some significant verticle stringing at 1100 yards, about 12" up and down, but less than 2" of windage, as it was a dead calm morning. Shot a 5 shot string through the magnetospeed, and 50 fps ES. DANGIT. So I did what I should have in the first place, and ran a ladder test, going up in .2 grain increments across a charge range that it seemed to like
When I did load developement with the 147 eld-m, and first switched over to Peterson small rifle primer brass, I did a primer test. I got the most consistent velocity with CCI BR-4 primers, so naturally that is what I started with.
In my ladder test though, I decided in addition to the workup with the BR-4's, I would throw in the same load workup using cci small rifle magnum primers. I thought, just maybe, the heavier bullet needs more ignition.
Well when I chronoed these loads, sure enough, the mag primers made a huge difference. Velocity was much more stable, and for some reason, loads with the BR-4 primers of similar velocity would exhibit some pressure signs where the mag primers would not. Just overall much better with the mag primers.
From 48.6 to 49.4, there was only 16 fps extreme spread, an S.D. of 7 and the average was 2920 fps and showed no pressure. So, I loaded up 6 of those and went to the range to see if they would also group well, as my ladder testing was inconclusive as far as groups, the magnetospeed bayonet kills accuracy in my rifle. They grouped under half MOA, and I wasn't the steadiest, so I called it good and loaded up 20 of them, opened up the tips with a .030" wire drill bit, and later today I am going to go test them on pronghorn, as it is opening day of doe/fawn season!!!
I have seen similar effects switching to the hotter 450's, particularly when temperatures are running lower. The thicker cup is also less prone to cratering at the higher pressures. Apologies if it was mentioned in a previous post, but what twist rate are you running?
I will be very anxious to hear of your results on game. Have you noted any differences in POI(BC) at the longer ranges when drilling the tips?
lancetkenyon
Well-Known Member
I hope to have a report of the 156 from my 6.5SS on pronghorn in the next 5 days as well....
If they work half as good as the 150 SMK did last year....I will be very happy. I am sure they will work just as well though.
If they work half as good as the 150 SMK did last year....I will be very happy. I am sure they will work just as well though.
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