LFP Comment Thread

[rickOshay]

More editing/rearranging done to make room for anticipated three new LFPs. Now all of the 120gr and heavier LFPs are on Page 2. Everything under on Page 1. Still trying to keep them in ascending order by weight.

[rickOshay]

Finally received the Barnes 115gr. TAC-TX.



Had to order them direct from Barnes. And because I live in CA, they made me provide a copy of my FFL03 ! For projectiles !!!

They admitted that not may distributers have bought them.

I've put the details in the LFP Summary thread. Now just waiting on the COVID-19 shutdown to be over to get to the range.

[BluntForceTrauma]

You happen to have the length of the Barnes 115gr?

[rickOshay]

You happen to have the length of the Barnes 115gr?

Posted in the other thread: 1.2845

Here are the Barnes 100, 115 and 120

Measurements to ogive are: 0.6115, 0.7630, and 0.7875 respectively.

Diameters at base of plastic tip are: 0.1365 - 120gr vs 0.1589 - 115 gr.




The bearing surfaces appear to be about the same for the 115 and the 120, at about 0.55" minus the 3 bands.

[rickOshay]

Just received two of the .264 cal LFPs from Hammer Bullets https://hammerbullets.com/product-tag/264-6-5mm/

On the left is the 110gr Hammer Hunter that measures 1.266" long. On the right is the 117gr Hammer Shock measuring 1.231"long.


Gels to follow this week.

[Bigs28]

I didn't see anything on their website that said minimum opening velocities. But i also saw a 99g bullet to. Looking forward to the results on these.

[rickOshay]

Here is the 110gr Hunter recovered after impacting the gel at 2000 fps. I has begun to open up. But shows its designed for
higher velocities than some of the other newer LFPs on the market.

It weighed 104.4 due to losing some material striking the bottom support. Penetration was 28" in a curved path.



And here is the 117gr Shock after impacting at 2016 fps. The petals have broken off down to the base. Base penetrated 26.5" and weighed 91.9 gr.

[Modoc]

@rickOshay, thank you for the research and write ups. I now have some LFPs to invest in and do load development with.

I’m looking at using IMR 4198 and H355 since those are in my stock already along with Hornady Brass and Federal Small Rifle AR Match primers. I’m looking at the CBB, Hammer, and Tac TTSX even though I have a box of the Hornady CX 120 gr.

Like you, I’m in Kalifornia, but the Northern portion (State of Jefferson).

[myrifle]

Here is the 110gr Hunter recovered after impacting the gel at 2000 fps. I has begun to open up. But shows its designed for
higher velocities than some of the other newer LFPs on the market.

It weighed 104.4 due to losing some material striking the bottom support. Penetration was 28" in a curved path.



And here is the 117gr Shock after impacting at 2016 fps. The petals have broken off down to the base. Base penetrated 26.5" and weighed 91.9 gr.

I have thought about trying their 85 grain bullet. But now that I see this, i think I'm going to pass on them. I want a shank pushing a mushroom completley through a animal. Not a pencil hole exit from just a shank.

[Fess]

Although I am beginning to sound like a broken record, take a look at Cavity Back. They use a three-petal design so each petal is beefier and less likely to shear off at higher velocity or after hitting bone. FWIW they claim "double caliber expansion down to 1500 fps". I have seen good reports from 300 BO and 6.8 SPC shooters.

[rickOshay]

Thanks for your comment.

The Cavity Back bullets were reviewed very early on and summarized here, post #12 and 20:

https://www.65grendel.com/forum/showthre....5-Grendel

[CavityBackBullets]

Thanks for your comment.

The Cavity Back bullets were reviewed very early on and summarized here, post #12 and 20:

https://www.65grendel.com/forum/showthre....5-Grendel

They have both been adjusted since those early tests to lower expansion speed a bit. As well as help petal retention on the 118 gr.
We can adjust every parameter due to the design and way they are manufactured which is something Barnes, Lehigh and Hammer cannot do.
Thank you both for your comments. We still maintain no bullet is more effective than a CBB from a Grendel. Nor do any match the distance we get expansion at 450 yards from a Grendel with the 118gr.

Something else we have found since those tests is that the length of the 118gr does not limit which powders you can use. The cavity offsets the length in this area.
We have also found that you can subtract 90% of the depth of the cavity from overall bullet length when figuring needed twist rate. This has proven true in all the calibers we produce which increases the SG in relation to barrel twist rate. Resulting in better stability.

[grayfox]

CBB, do you have some more "~Exact" guidance on load data, such as powders, typical OAL for a true Grr throat, esp the 105's and 118 hunting bullets.
Putting that info here would help a lot of shooters.
thanks.

[Happy2Shoot]

@CavityBackBullets

Any idea when your Cavity Back MKZ 195 grain Subsonic 7.62/.308 will be back in stock? I wanted to buy them and your Cavity Back MKZ 118 grain 6.5/.264 at the same time to save on shipping.

[Happy2Shoot]

Soooo, I did a little Googling. Turns out Cavity Back Bullets have an Achilles' Heel. If you shoot the 195gr out of a 1/5 300 Blackout they open up in flight.

https://www.ar15.com/forums/AR-15/7-5-30...2#i8454832

[ATTACH=CONFIG]19006[/ATTACH]

[ATTACH=CONFIG]19007[/ATTACH]

[VASCAR2]

A 1:5 twist is really fast twist for a 30 caliber even out of a short barrel. Maybe the composition of the CBB is soft enough the monolithic bullet is being over stressed like some thin jacket .224 blitz bullets in 1:7 twist barrels.

[CavityBackBullets]

Soooo, I did a little Googling. Turns out Cavity Back Bullets have an Achilles' Heel. If you shoot the 195gr out of a 1/5 300 Blackout they open up in flight.

https://www.ar15.com/forums/AR-15/7-5-30...2#i8454832

[ATTACH=CONFIG]19006[/ATTACH]

[ATTACH=CONFIG]19007[/ATTACH]

We were just made aware of this recently.
The subs are being adjusted to run in 1:5 twists barrels.
There will be a batch out soon.

Robert

[Happy2Shoot]

We were just made aware of this recently.
The subs are being adjusted to run in 1:5 twists barrels.
There will be a batch out soon.

Robert

This is awesome!
Thanks!