88 TMK Loading Thread

[NoDakhunter]

Does anyone have a picture of the Sierra recommendation chart @Nine Banger is referencing?

 

[Nine Banger]

Does anyone have a picture of the Sierra recommendation chart @Nine Banger is referencing?

It's on one of the threads maybe 22 Creedmoor thread.

 

[ChrisAU]

@Nine Banger what cartridge? 223 Rem?

 

[rafiki]

it was this one. forget who, but someone posted that the sierra rep said to use the 90gr MK chart for now.

 

[Nine Banger]

@Nine Banger what cartridge? 223 Rem?

22 Creed.

I'll edit.

 

[ChrisAU]

22 Creed.

I'll edit.

Ah seemed slow for an 18" with an 88gr pill?

I'm thinking about tossing my 16.5 22CM 1:8 for a 16.5 22GT 1:7, but I want to get atleast 2800 or so.

 

[Bluumoon]

Hogdon 90gr bullet (not specified) for 22CM

 

[amassi]

Hogdon 90gr bullet (not specified) for 22CMView attachment 1036209

90 g a-tip


Sent from my iPhone using Tapatalk

 

[Formidilosus]

22 Creedmoor.

I had to put a barrel back on and I forgot it was 1:7.5 and didn’t notice that until it was torqued and out of the vise. I’m at the sea-est of the levels so I figured let’s see if it’ll do it. (I have an 18” 1:7 too)

It's almost summer here. If you haven't experienced SEUSA yellow pine pollen its something else. I'm wearing my Duckworth Vapor Hoody today too.

View attachment 1036114View attachment 1036115View attachment 1036118

18” PBB barrel 1:7.5” twist 2.685” OAL (lands were 2.710ish)

DA: -308ft

View attachment 1036119View attachment 1036120

45gr Staball HD 2693fps. This was listed as a "Max Load" from that chart someone posted that Sierra said we should follow. I need 2775 to get quick drop at 0 elevation but man look at that group.

View attachment 1036117

View attachment 1036116


I'm back on that crappy brass I've been nursing and had a case head failure on the first round and partial on the second.

I'm tempted to stuff a few more grains in there and tap it down or get crunch to see if I can get 2775 but I really want to cut this barrel down to 14" so unfortunately another swing and a miss for Staball HD around here.

Told you they shoot.


The 88gr ELD-M is dead.

 

[Nine Banger]

Ah seemed slow for an 18" with an 88gr pill?

I'm thinking about tossing my 16.5 22CM 1:8 for a 16.5 22GT 1:7, but I want to get atleast 2800 or so.

I think the numbers we are using from that chart are low.

2800 seems attainable.