safe 308 loads

[bobby]

could the fundis please  help .

i loaded the following for my cz 550 308 with a 22'' barrel .

new full sized 308 lapua case
win std large rifle primer
165gr nosler balistic tip
oal 71,5 mm
40,5 gr s335 @ 2565 fps  and 41,6gr s335 @ 2667 fps  both of these gave good groups .

there are no pressure signs ,bolt opens nice and primers are not flat still round around the edges .

i am a little concerned about the high velocties reached with 41,6 gr s335 is it still safe ?  i have before used a 165gr sierra game king bullet and 41,5 gr s335 in a pmp case and only got 2560 fps .

3 questions
is it the diff batches of powder , diff bullet or case which caused the higher velocitys ?

many thanks and cheers
bobby 

[Theo E]

could the fundis please  help .

i loaded the following for my cz 550 308 with a 22'' barrel .

new full sized 308 lapua case
win std large rifle primer
165gr nosler balistic tip
oal 71,5 mm
40,5 gr s335 @ 2565 fps  and 41,6gr s335 @ 2667 fps  both of these gave good groups .
there are no pressure signs ,bolt opens nice and primers are not flat still round around the edges.

i am a little concerned about the high velocties reached with 41,6 gr s335 is it still safe ?  i have before used a 165gr sierra game king bullet and 41,5 gr s335 in a pmp case and only got 2560 fps .

3 questions
is it the diff batches of powder , diff bullet or case which caused the higher velocitys ?

many thanks and cheers
bobby 

Bobby
I do not consider my self a fundi but
All 3 will play a roll on presure
Example  a thicker case will cause more  presure thus increasing the velocity and vise versa
Not to forget bullet seating depth will also play a roll on presure .
As you said there was no sign of Presure, then you should have nothing to worry about.
Cheers
Theo

[tripodmvr]

Had a look at Quick Load with the data you provided. It also predicts higher speeds with the Noslers. The Nosler is a longer bullet and could cause more friction relating to higher pressure and speed.

At 41,6 the pressure is shown as 4000psi below maximum. I would progress carefully as every rifle is unique. Dont exceed speeds published by Somchem as that means you are above their maximum prescribed pressure - speed = pressure.

[cassie_calvinia]

hi
i load 150 nosler bt. s335 42.8gr, 1750fps. my aol 72.4mm.

[tripodmvr]

At this stage Quick Load is using general accepted data for the 308. To accurately predict what is happening with your rifle measurements of your specific firearm would be needed.

Lessening the COL increases pressure whilst a longer COL lowers it.

[Vosman]

Cassie,
Daai lading van jou klink vir my bietjie stadig? Ek skiet 'n 150gr sierra GK met 42.9gr S335 teen sowat 2650fps. My loop is 23.45" lank.

[cassie_calvinia]

ag vosman, sorry, bedoel 2750. ook maar lekker stupid

[Vosman]

Dit klink baie beter.
Die manne gee reeds moeilikheid oor ons ketties, maar ek weet hulle is nie sooo stadig nie!
Hoe lank is jou loop? ek skiet die 150 Sierra GK ook met 45.9gr S335 dan kry ek so 2830fps, en ek het dan 'n node geslaan,( en ek het nog net 1 effens platgeslaande primer gekry) . Die 42.9gr lading sal ek so .2gr warmer maak en kyk om dan die node mooi te slaan.
Ek sou aanbeveel om QL aan te skaf dan kan jy lekker speel.

[cassie_calvinia]

ja vos, die manne wat hom nie het, sal baie praat. al wat ek weet, ek ken my kettie, en die skoot sit waar ek vat.
nie seker oor loop. dis 'n 7,62 musgrave rsa. die mense wat nie so lekker kan afstand skat, moet seker maar met die vinnige plat goed skiet om raak te skiet

[Vosman]

Cassie,
As 'n man sy roer ken, dan ken hy hom!
Search 308 ladings, jy sal ook baie inligting daar kry.
Groetnis!