? on .223 bbl lenth Mzl Vel.

TFL · May 12, 2010, 09:44 AM

Speer # 11 manual
18.5" BBL, 1-10 Twist Mini 14
W-W Cases H335, 25gr, 2948 mzl vel, 55 gr FMJ-BT #1044

Speer # 13 manual
22" bbl 1-12 twist Ruger 77 Mk II
IMI Cases H335, 24gr 2805 mzl Vel, 55 gr FMJ-BT #1044

What would a Guess-a-mutt of
1. LC-08 case H335 24gr, 1-10 twist mini 14 Mzl Vel
2. LC-08 Case with speer #11 load

Any Help would be welcome
TFL

zippy13 · May 12, 2010, 10:28 AM

Greetings TFL and welcome aboard.

If I understand your question correctly, the answer is: Get a chronograph.

You simply haven't provided enough info for a meaningful SWAG (scientific wild-ass guess). You neglected to mention what bullet and primer you'll be using. Based on the data provided, it looks like you're using a 55 gr bullet. Speer makes several.

The powder manufacture's data suggest a 55 gr Speer SP with H335 powder...

A starting load of
23.0 gr at 3108 ft/sec with 40,800 CUP to a maximum of
25.3 gr at 3202 ft/sec with 49,300 CUP

rg1 · May 12, 2010, 12:33 PM

Just a guess from my experience with H335 and 55 grain bullets in a .223 with a 16" barrel pistol and AR's.
24 gr. H335 in 18.5" barrel---2800-2850 fps
25 gr. H335 in 18.5" barrel---a little over 2900-3000 fps
That's just a guess. Depends on the gun, loading components used, temperature, etc. Only way to know for sure is a chronograph. 24.5-25 grains shoots good in my rifles with 55gr bullets using H335 in various cases.
Average velocity loss going from a 20" barrel to a 16" barrel is about 80-120fps depending on the loading components and rifle.

TFL · May 12, 2010, 01:46 PM

RG1
You have supplied the info I was looking for.
Thanks

May 12, 2010, 10:28 AM	#2
zippy13 Senior Member Join Date: August 23, 2008 Location: SoCal Posts: 6,442	Greetings TFL and welcome aboard. If I understand your question correctly, the answer is: Get a chronograph. You simply haven't provided enough info for a meaningful SWAG (scientific wild-ass guess). You neglected to mention what bullet and primer you'll be using. Based on the data provided, it looks like you're using a 55 gr bullet. Speer makes several. The powder manufacture's data suggest a 55 gr Speer SP with H335 powder... A starting load of 23.0 gr at 3108 ft/sec with 40,800 CUP to a maximum of 25.3 gr at 3202 ft/sec with 49,300 CUP Last edited by zippy13; May 12, 2010 at 10:34 AM.

May 12, 2010, 12:33 PM	#3
rg1 Senior Member Join Date: November 6, 2001 Posts: 1,125	Just a guess from my experience with H335 and 55 grain bullets in a .223 with a 16" barrel pistol and AR's. 24 gr. H335 in 18.5" barrel---2800-2850 fps 25 gr. H335 in 18.5" barrel---a little over 2900-3000 fps That's just a guess. Depends on the gun, loading components used, temperature, etc. Only way to know for sure is a chronograph. 24.5-25 grains shoots good in my rifles with 55gr bullets using H335 in various cases. Average velocity loss going from a 20" barrel to a 16" barrel is about 80-120fps depending on the loading components and rifle. Last edited by rg1; May 12, 2010 at 12:45 PM.

May 12, 2010, 01:46 PM	#4
TFL Junior Member Join Date: April 20, 2010 Location: Southern MN Posts: 13	Thank you RG1 You have supplied the info I was looking for. Thanks __________________ TFL

May 12, 2010, 09:44 AM	#1
TFL Junior Member Join Date: April 20, 2010 Location: Southern MN Posts: 13	? on .223 bbl lenth Mzl Vel. Speer # 11 manual 18.5" BBL, 1-10 Twist Mini 14 W-W Cases H335, 25gr, 2948 mzl vel, 55 gr FMJ-BT #1044 Speer # 13 manual 22" bbl 1-12 twist Ruger 77 Mk II IMI Cases H335, 24gr 2805 mzl Vel, 55 gr FMJ-BT #1044 What would a Guess-a-mutt of 1. LC-08 case H335 24gr, 1-10 twist mini 14 Mzl Vel 2. LC-08 Case with speer #11 load Any Help would be welcome TFL __________________ TFL Last edited by TFL; May 12, 2010 at 10:34 AM. Reason: More info