Barnes 110gr

[Mlrazorback]

Good evening, first post and looking to improve my loading skills! I just started using OAL gauge and based on my workup It's calling for an OAL length to be 2.215. The book recommends 2.250 and that's what I've always loaded. I understand each rifle will have it's own number, curious if anyone has input on OAL. Any loads in this OAL range?

[tallburnedmidget]

Good evening, first post and looking to improve my loading skills! I just started using OAL gauge and based on my workup It's calling for an OAL length to be 2.215. The book recommends 2.250 and that's what I've always loaded. I understand each rifle will have it's own number, curious if anyone has input on OAL. Any loads in this OAL range?

Hi there and welcome!

I've only ever loaded the blacktip to 2.250 myself. I would think that ifyou laoded to 2.215 you might overshoot the groove a bit. I'm not looking at a blacktip right now but would that start getting too deep at all? Have you loaded one up yet to see what it looks like?

[BOB567]

What about the blue tip ttsx 110 grain? Anyone tried that bullet in 300 blackout?

[BlogSarge]

The blacktip is a 300blk specific bullet, made for blackout velocities.

The bluetip is made for normal 308Win velocities.

The blues might no9t expand well out of a 300blk

[BOB567]

Thanks.

[dellet]

This can be confusing without a bullet number. Barnes makes 5 different 110 grain .308 bullets. Three are tipped.

30321 Blacktip
Designed from the ground up for 300 Blackout. Expands down to 1350 fps, petals can shear off on impact around 2500 fps and above. Crimping at the cannelure will set the COL just short of magazine length.

Now the confusing part and I hope I get it correct.

Barnes Tac-X 30336 and Tac-TX 30358, same bullet w/wo tip.

Designed for 308 SBR’s. And has a lower than normal expansion velocity 1600 fps if I am correct.

Barnes TSX 30342 and TTSX 30362

Standard 308 velocity 1800 fps.

Barnes minimum expansion velocities are not published but their tech department is easily reached and always very helpful. It worth a call as I might have not got the actual low end thresholds correct.

[bangbangping]

Good evening, first post and looking to improve my loading skills! I just started using OAL gauge and based on my workup It's calling for an OAL length to be 2.215. The book recommends 2.250 and that's what I've always loaded. I understand each rifle will have it's own number, curious if anyone has input on OAL. Any loads in this OAL range?

Which OAL gauge are you using and how did you arrive at 2.215? Please post the tool and your process.

Assuming you're talking about the black tip bullet, there is no need to load that short. At mag length the bullet is a long way away from the lands, somewhere around 0.140". Also at mag length, max load with most common powders will be near 100% density or even compressed. I can't think of any reason at all to load that short.

[plant.one]

Good evening, first post and looking to improve my loading skills! I just started using OAL gauge and based on my workup It's calling for an OAL length to be 2.215. The book recommends 2.250 and that's what I've always loaded. I understand each rifle will have it's own number, curious if anyone has input on OAL. Any loads in this OAL range?

Which OAL gauge are you using and how did you arrive at 2.215? Please post the tool and your process.

Assuming you're talking about the black tip bullet, there is no need to load that short. At mag length the bullet is a long way away from the lands, somewhere around 0.140". Also at mag length, max load with most common powders will be near 100% density or even compressed. I can't think of any reason at all to load that short.

^^^ what he said.

this is a bullet designed specifically for mag length - 2.250" OAL - for the 300 blackout world. there is absolutely zero reason to seat that bullet anywhere anywhere outside the cannelure besides possibly a bit longer for single feed if you're trying to eek out every little bit of extra powder capacity.

[Mlrazorback]

I used Hornady OAL gauge. Measured to the rifling then used the following formula

Barnes 110 gr Tac TX
H-110
initial OAL of rifle 1.475
Head-space of modified case 1.071
0.404

Head-space of case being loaded 1.071
True AOL @ O-Give of the lands 1.475

Desired Jump to the lands 0.020

Final seating depth @ the O-Give 1.455

Final OAL estimate 2.215

[dellet]

There are two Barnes Tac-TX 110 grain 308 bullets.

30320 Blacktip, 1.175” long

30358 Bluetip, 1.047” long.

As far as I know there’s is no published data for the bluetip.

If you load the bluet tip .130” shorter than the published data, you will have the same seating depth and reasonably close pressure and velocity. That would be 2.120”.

As long as that does not hit the lands you’re fine.


Your math is sound, as is your process. The issue is you do not have the bullet you think you do if it is the bluetip.

If this is the Blacktip, then it’s back to the drawing board. Either you measurements are off, or the chamber is short.