Eric with the 8-30 hornady tool base to ogive is .6515 oal 1.320
Nosler RDF Bullets
- Thread starter Delfuego
- Start date
I was able to get out today and check out the new Nosler 6.5 140 gr RDF. This is the first chance I have had with this bullet so this is purely preliminary field testing and I do not speak for Nosler when it comes to official release of information on this bullet. I did my standard 10 round ladder load development this morning and the results were exactly like the other 140 gr bullets I shoot in the 6.5 "swedemoor". I have been running H4831 with 140 class bullets with great results. Lately I have been tinkering with RE-26 and after some experimentation purchased almost all of the remaining stock. I digress, so the test. Zero was confirmed with both bullets before the test and for reference I have shot 19,414 Berger hybrids in the last few years in competition so this is a well known bullet for me. Additionally, my sport does not have sighting rounds so your first round has to count I take my data seriously.
side by side test targets at 411, 509, 683, 741, 863, 974, 1043, 1110, 1179 and 1380
140 Berg Hyb pointed known BC of .314. MV 3063 with an ES of 7 with a best group of .190 ish at 100
140 Nosler RDF BC unkonwn MV 3062 with an ES of 5 (10 shots) best group .250ish
Using my 140 hyb data in my Kestrel 5700 with AB I began to engage with the 140 RDF. I started to see separation at 740 the RDF was impacting about .1 high. By the time I reached 1380 I had to come down .8 in order to achieve a center mass grouping. Backing into the BC is .341 G7 and G1 of .692.
In order to measure apples with apples I engaged the same set of targets with my pointed 140 Hyb and achieved center mass hits on every target out to 1380 BC G7 .314.
Sunday I will get out past 2000 with this bullet and will have another set of eyes to help me out.
This thread has been taxing to say the least so before you go after me with pitch forks quoting or APA siting one source of info, do a little Face Book stalking and figure out who I am and what I do before you go after me.
v/r
Scott Satterlee
side by side test targets at 411, 509, 683, 741, 863, 974, 1043, 1110, 1179 and 1380
140 Berg Hyb pointed known BC of .314. MV 3063 with an ES of 7 with a best group of .190 ish at 100
140 Nosler RDF BC unkonwn MV 3062 with an ES of 5 (10 shots) best group .250ish
Using my 140 hyb data in my Kestrel 5700 with AB I began to engage with the 140 RDF. I started to see separation at 740 the RDF was impacting about .1 high. By the time I reached 1380 I had to come down .8 in order to achieve a center mass grouping. Backing into the BC is .341 G7 and G1 of .692.
In order to measure apples with apples I engaged the same set of targets with my pointed 140 Hyb and achieved center mass hits on every target out to 1380 BC G7 .314.
Sunday I will get out past 2000 with this bullet and will have another set of eyes to help me out.
This thread has been taxing to say the least so before you go after me with pitch forks quoting or APA siting one source of info, do a little Face Book stalking and figure out who I am and what I do before you go after me.
v/r
Scott Satterlee
Scott your getting 3060FPS with a 140 in a creedmore??? seems very fast to me, is that because of the RL26?
Scott shoots the "swedemoor" 6.5x55 swede improved to 30 degree shoulder if I'm not mistaken .
Uup 37 degree shoulder ,9 degree body taper. Bore rider type reamer
RE 26 helps for sure its an extra 50 fps
Keith Glasscock
Gold $$ Contributor
Scott,
I appreciate the side by side testing. Having the closest competitor bullet shot at the same time makes drop based BC calculations much more reliable in my eyes.
I appreciate the side by side testing. Having the closest competitor bullet shot at the same time makes drop based BC calculations much more reliable in my eyes.
I just used my Berger load got something that would print a good group at the same velocity and went to the range. Yesterday afternoon the wind died so I went back to the reloading bench. I have a 400 yard range at my house so load development isn't a huge chore. IT turns out that the RDFs love to get a running start at the rifling. My original load was maybe .020 off the lands. I started loading the bullet further out and the sweet spot is .030-.060 off. I didn't see an accuracy degrade until about .090 off the lands. Best group was still .250 but that really is about as good as I can shoot. I shoot from the prone on a bi-pod and my porch is concrete every once in a while I can go really small with a group but not very often.
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I was doing the math for the 175gr RDF
To keep a 2.880oal mag length for the PMAG AICS
To give the RDF a .030 jump at 2.880 it would require a FB of .040
Please someone check my math
Conclusion i going to need a palma reamer .050fb reamer
1.320 bullet oal
.6515 base to ogive (which mimics the 175SMK)
To keep a 2.880oal mag length for the PMAG AICS
To give the RDF a .030 jump at 2.880 it would require a FB of .040
Please someone check my math
Conclusion i going to need a palma reamer .050fb reamer
1.320 bullet oal
.6515 base to ogive (which mimics the 175SMK)
My 308 chamber is the Bisley reamer. I did jump the 308 a lot further than the 140s with out issue. The 6.5 Addiction is stretching it in a Short action. I have to have a bullet that can jump but I can't seat it in the case too far without putting the Ogive in the neck. I have shot a ton of the 308s in testing looking at my notes .030-.100 was fine. I used 42.5 gr of IMR 8208, win brass, fed 210m, 1-10 26" barrel for 2725 fps and stupid low ES. I used that load to proof stages at the Q Creek ELR match and hit every target out to 1821y. Some of them I hit right away others took me more than a few to connect but it wasn't data that was killing me it was the 13-21 mph winds.
Just a quick thought to mull over as far as computing your ballistic coefficients.
You need to record and publish your barometric pressure, humidity (or dew point), altitude, and for ranges over 600 yards the direction of shooting with your measured BC. The manufacturer will have corrected their data to standard atmospheric conditions. Higher altitude and humidity will indicate a higher BC while higher pressure will indicate a lower BC. At ranges over 600 yards shooting east will show measurably higher BC than shooting west.
Even with the best 6DoF software calculating ballistics over long range is only an estimate. Just a small up or down draft or a head or tail wind will register a higher or lower BC with identical bullets.
You need to record and publish your barometric pressure, humidity (or dew point), altitude, and for ranges over 600 yards the direction of shooting with your measured BC. The manufacturer will have corrected their data to standard atmospheric conditions. Higher altitude and humidity will indicate a higher BC while higher pressure will indicate a lower BC. At ranges over 600 yards shooting east will show measurably higher BC than shooting west.
Even with the best 6DoF software calculating ballistics over long range is only an estimate. Just a small up or down draft or a head or tail wind will register a higher or lower BC with identical bullets.
Did you happen to measure the bearing surface of these two bullets for comparison??Well here's the new 140 RDF (left) and a Berger 140 Hybrid on the right. You make your own conclusions, I'll be working on mine.
If so, what did you find?
All you comments are valid. I would add that every bullet potentially has a different BC based on slight variances in shape which is the primary reason I started pointing bullets. Take a look at earlier posts in the thread. Where I recorded the atmospherics. Additionally, I'm not producing the official BCs for this bullet.
I'm getting tired reading all this bickering over what the EXACT BC is of not only the Nosler RDF but the new Hornady tipped bullets.
I have shot competition with A-MAX, SMK and Berger Hybrids with both my 6BRX and 284 WIN. They all shoot good with, frankly, better results in my guns with A-MAX.
I could care less to a first order what the EXACT BC is, they are all good. Actually much better than my skill can determine.
What I want to know about the new Hornady and Nosler competition bullets is how consistent are they? Can I trust that all bullets in one lot # will be the same? What will be the SD and ES of the weight and base to ogive measurement? What is lot to lot variation? I have already heard from Hornady that A-MAX bullets are tested by lot to 1 MOA at 100yd! Not adequate!
I have learned that up to the new bullets you all are arguing about, Berger had the most consistent bullets. But, the most expensive were also Berger. If I find that either Hornady or Nosler new technologies yield better consistencies or at least nearly as good as Berger, I'm going to go to those bullets.
I will change as I will have to spend less time grading bullets and spend less money buying them. After all I, like many of you, am retired and bullet cost is important! I can't just order 5000 Hybrids of the same lot when the other brands are $700 less! Realistically, I buy by the 500 box and that is a $70 difference!
So, I would like some real data on consistencies and I will worry about the BC. Meanwhile, I'll buy some of both and do my own testing.
I have shot competition with A-MAX, SMK and Berger Hybrids with both my 6BRX and 284 WIN. They all shoot good with, frankly, better results in my guns with A-MAX.
I could care less to a first order what the EXACT BC is, they are all good. Actually much better than my skill can determine.
What I want to know about the new Hornady and Nosler competition bullets is how consistent are they? Can I trust that all bullets in one lot # will be the same? What will be the SD and ES of the weight and base to ogive measurement? What is lot to lot variation? I have already heard from Hornady that A-MAX bullets are tested by lot to 1 MOA at 100yd! Not adequate!
I have learned that up to the new bullets you all are arguing about, Berger had the most consistent bullets. But, the most expensive were also Berger. If I find that either Hornady or Nosler new technologies yield better consistencies or at least nearly as good as Berger, I'm going to go to those bullets.
I will change as I will have to spend less time grading bullets and spend less money buying them. After all I, like many of you, am retired and bullet cost is important! I can't just order 5000 Hybrids of the same lot when the other brands are $700 less! Realistically, I buy by the 500 box and that is a $70 difference!
So, I would like some real data on consistencies and I will worry about the BC. Meanwhile, I'll buy some of both and do my own testing.
It's too early to tell weather or not they will be super consistent from lot to since they have been only a few lots of the Hornady and only one lot of the Noslers. The Hornady ammo that I have seen shot is solid and the bullets are super accurate. Since both companies seem to be really stepping up to produce solid match bullets I have a feeling they will be changing out their dies more frequently to maintain that consistency.
Thanks Scott!
I will surely buy some Hornady from a couple lots (if I can find them).
Same goes for Nosler.
I will report here what I find.
I will surely buy some Hornady from a couple lots (if I can find them).
Same goes for Nosler.
I will report here what I find.
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