Nosler .270 170 gr Ballistic Tip

[Muddyboots]

Warning: these loads were safe in my rifle. Use standard safe reloading practices for your rifle.
Rem 700 LA - 27" Preferred Barrel - Light Palma - 1:8Tw - 5R - 0.290 freebore added - Max 3.65 COAL
Sig brass - annealed
FM215 primer - note - I really didn't see any difference from using FM210's since similar to velocities with 170EOL
Nosler 170 BT Blems
RL-26
Not crimped
35 degrees but no snow!
Range live, started with clean barrel but decided to go with ladder anyway. 170 BT RL26
1-2737-56.0 gr
2-2801-57.0 gr
3-2867-58.0 gr
4-2930-59.0 gr
Cool down right now, 4 rounds left in ladder, zero sign of pressure so far.

 

[Muddyboots]

5-2956 brass looks great!

 

[Muddyboots]

Warning: these loads were safe in my rifle. Use standard safe reloading practices for your rifle.
6-2976 no pressure-60.0 gr
7-3009 no pressure-60.5 gr
8-3030 very slight ejector - stopped-61.0 gr
I do not push my brass and conservative in pressure stops.
See updated load dated in post 43.

All in all pleased with 3000 without pressure! I will add in load data once back to house. Forgot load sheets.

The 170BT should be nice hunting load around 3000fps!! I will do some more load work based off the velocities. I am in my backyard so limited to just velocity work.

 

[xsn10s]

6-2976 no pressure
7-3009 no pressure
8-3030 very slight ejector - stopped
I do not push my brass and conservative in pressure stops.

All in all pleased with 3000 without pressure! I will add in load data once back to house. Forgot load sheets.

The 170BT should be nice hunting load around 3000fps!! I will do some more load work based off the velocities. I am in my backyard so limited to just velocity work.

Looks pretty awesome!

 

[Muddyboots]

Yeah it was really nice to see and prob do load in 2950-2975

 

[xsn10s]

I'd like to know what the actual BC would be. At face value that bullet going 3000 fps @ 4000 ft elevation would still give me 1500 ft/lbs at 700 yards.

 

[Muddyboots]

Yeah, this is at 800'!

 

[Calvin45]

6-2976 no pressure
7-3009 no pressure
8-3030 very slight ejector - stopped
I do not push my brass and conservative in pressure stops.

All in all pleased with 3000 without pressure! I will add in load data once back to house. Forgot load sheets.

The 170BT should be nice hunting load around 3000fps!! I will do some more load work based off the velocities. I am in my backyard so limited to just velocity work.

Holy smokes that's way higher than I thought she'd go…and not because of my "scientific" analysis, just legit very surprising. One of these days I NEED to acquire rl26 somehow, it really does seem magical.

 

[Muddyboots]

Calvin: this is where I get my RL26 pixie dust...

 

[Muddyboots]

Well…I've consulted my idiotic brain (the crystal ball previously mentioned) and predict 2867.8 fps (yes, .8 included)

Now I'd like to tell you that it's based on something intelligent. I know that's a good bit less energetic than the hammer load you worked up. And I could account for my prediction with the btip having all kinds more bearing surface and no pdr voodoo grooves and such…but here goes: it's all the metric system's fault!

.270 cartridges are designated as 6.8mm in metric.

So obviously 680 meters per second makes sense. BUT only works out to 2244 fps. Somethings missing. Gotta pay homage to the fact that it's not a metric cartridge. So obviously you add 277 to this total. And 170, that's the bullet weight, it just makes sense. Add 64.5 to reflect the case length in millimeters and 47.3 to indicate how many hundredths of an inch the case head diameter is (continuing to acknowledge both imperial and metric measurements to be diplomatic). Finally, today is the 65th day of 2022 and only an idiot wouldn't account do this in his calculations, so add 65 too.

Adds up to 2867.8

I was looking over your scientific calculation and noticed a glaring error! You forgot to add in my age and temperature which is spot on to velocity I got.

 

[grouse]

Free bore?

 

[Calvin45]

I was looking over your scientific calculation and noticed a glaring error! You forgot to add in my age and temperature which is spot on to velocity I got.

And here I thought I forgot to carry the 1

 

[Muddyboots]

Free bore?

Sorry, missed your question.
Yes, 0.290 free bore added so I could max out 700LA Max COAL and still feed well.

 

[TRexF16]

Been a few months - any progress Boots? How did the accuracy testing go? Amazing velocities you got in your testing so far.
Cheers,
Rex