7mm-08 and 162 ELD-M

[jfk69]

I sprinkle Big Game on my cornflakes.






P

The saltpeter might give you undesirable side effects lmao.

 

[Pharmseller]

The saltpeter might give you undesirable side effects lmao.

Cialis for the counter.

This line of repartee would be a lot more fun if I knew you better.

Stuff like, you know that from experience?, or that’s why…(some comment about a female family member), stuff guys can get away with if they know each other.





P

 

[Kimber7man]

There you go Pharm, making new friends.... grin

 

[jfk69]

Cialis for the counter.

This line of repartee would be a lot more fun if I knew you better.

Stuff like, you know that from experience?, or that’s why…(some comment about a female family member), stuff guys can get away with if they know each other.





P

You won’t offend me, and my quip was offered in jest. I’m sure we would get along well lol. My wife references me as rude, crude and socially unacceptable…

 

[Pharmseller]

You won’t offend me, and my quip was offered in jest. I’m sure we would get along well lol. My wife references me as rude, crude and socially unacceptable…

We can be friends, but no weirdness. They talk about you here.




P

 

[Fmuguira]

Shot lots of Varget and H4350 with 162 s in my 7-08. 40.8 grs of Varget did 2600-2625 fps and 45.5 grs H4350 did same. Both are full pressure and should be worked up to.

Have had similar success with N550 at 43 grs.

 

[jjohnsonElknewbie]

Loaded up 20 with 46.5 of SB 6.5 and fired 15 this morning on the backyard range. The SD and ES weren't great, but the group was excellent. Thanks to all the folks on here that have helped me remedy process issues at the bench. I was only planning to shoot 12, but the Magneto Sport captured a 300 and a 3800 that I excluded from the sample. Can't wait to get a Garmin...

Range was 100 yards.

18" Tikka T3 lite in 7-08
KGM 30 suppressor
Alpha OCD brass

Staball 6.5 testing	Avg	2628
162 ELDX	SD	13
46.5 grains of powder	ES	44
CCI LRP
1	2613
2	2648
3	2608
4	2652
5	2628
6	2621
7	2632
8	2620
9	2621
10	2642
11	2635
12	2632
13	2616

 

[TxLite]

Loaded up 20 with 46.5 of SB 6.5 and fired 15 this morning on the backyard range. The SD and ES weren't great, but the group was excellent. Thanks to all the folks on here that have helped me remedy process issues at the bench. I was only planning to shoot 12, but the Magneto Sport captured a 300 and a 3800 that I excluded from the sample. Can't wait to get a Garmin...

Range was 100 yards.

18" Tikka T3 lite in 7-08
KGM 30 suppressor
Alpha OCD brass

Staball 6.5 testing	Avg	2628
162 ELDX	SD	13
46.5 grains of powder	ES	44
CCI LRP
1	2613
2	2648
3	2608
4	2652
5	2628
6	2621
7	2632
8	2620
9	2621
10	2642
11	2635
12	2632
13	2616

Great shooting. The Garmin is absolutely worth it.

 

[jjohnsonElknewbie]

Great shooting. The Garmin is absolutely worth it.

Thank you sir and hopefully it will be in my hands this fall.

Its time to take this rifle and load across the section to my neighbor's range and true it up downrange. I should be able to get out to 300 now and even further once the corn is out.

 

[jfjohn77]

FYI.... I plugged your numbers into GRT and your pressures exceed SAAMI to the tune of +16000 psi on the top end and +5000 on the bottom charge. I wouldn't expect very good brass life at those charges. Probably also be a smart idea to keep an eye on your bolt lugs and check your headspace from time to time... at least to keep something Bad from sneaking up on you. Also, I have assume this is a standard 7-08 Rem. and not an Ackley Imp. since I didn't see that posted anywhere unless I missed it. If an AI version, you can lower those pressures by 6000 to 5000 psi.

 

[TxLite]

FYI.... I plugged your numbers into GRT and your pressures exceed SAAMI to the tune of +16000 psi on the top end and +5000 on the bottom charge. I wouldn't expect very good brass life at those charges. Probably also be a smart idea to keep an eye on your bolt lugs and check your headspace from time to time... at least to keep something Bad from sneaking up on you. Also, I have assume this is a standard 7-08 Rem. and not an Ackley Imp. since I didn't see that posted anywhere unless I missed it. If an AI version, you can lower those pressures by 6000 to 5000 psi.

Not saying you’re wrong about the high pressure based on the velocities but GRT doesn’t have great calibration on Staball 6.5. Hodgdon lists 59,000 for 47.8gr

 

[TxLite]

FYI.... I plugged your numbers into GRT and your pressures exceed SAAMI to the tune of +16000 psi on the top end and +5000 on the bottom charge. I wouldn't expect very good brass life at those charges. Probably also be a smart idea to keep an eye on your bolt lugs and check your headspace from time to time... at least to keep something Bad from sneaking up on you. Also, I have assume this is a standard 7-08 Rem. and not an Ackley Imp. since I didn't see that posted anywhere unless I missed it. If an AI version, you can lower those pressures by 6000 to 5000 psi.

Also, that grt screenshot is at 2.8 coal which is showing 108% load ratio. What does it say when you punch it in at 2.9 coal? I’m not at my computer or I’d plug it in.

 

[jfjohn77]

Little better at 2.9.

 

[jjohnsonElknewbie]

FYI.... I plugged your numbers into GRT and your pressures exceed SAAMI to the tune of +16000 psi on the top end and +5000 on the bottom charge. I wouldn't expect very good brass life at those charges. Probably also be a smart idea to keep an eye on your bolt lugs and check your headspace from time to time... at least to keep something Bad from sneaking up on you. Also, I have assume this is a standard 7-08 Rem. and not an Ackley Imp. since I didn't see that posted anywhere unless I missed it. If an AI version, you can lower those pressures by 6000 to 5000 psi.

I'm not familiar with GRT, and thank you for the information. Do these calculations take into account COL? The SAAMI max COL for the 7-08 is 2.800". The Hodgdon reloading max load information for the 162 ELDM and 7-08 is below at 2.875" COL.



I'm running 2.925" COL with 46.5 gr of SB 6.5. Subtracting 150 fps for 18" vs 24" barrel, I should be around 2,671 MV. My average MV was 2,628 with a high of 2,652. That's all to say that I would expect to be under 59,000 PSI.

If I'm missing something it wouldn't be the first time, and I appreciate any additional information you may have. Thank you!

EDIT: sorry guys, I posted this before I saw the additional responses. Thanks again!

 

[jfjohn77]

What twist are you running? The data you are showing is for 1:9.5 twist... as the twist rate gets faster the pressures increase, as in 1:7 twist. Now please don't take my numbers as gospel, because GRT like QL both are just estimations and only as good as the information inputted into the program. Numbers will vary as the inputted data is changed and all barrels are different. Tighter bores increase pressure, as in .218 vs .219. Your mileage may vary!

 

[jjohnsonElknewbie]

What twist are you running? The data you are showing is for 1:9.5 twist... as the twist rate gets faster the pressures increase, as in 1:7 twist. Now please don't take my numbers as gospel, because GRT like QL both are just estimations and only as good as the information inputted into the program. Numbers will vary as the inputted data is changed and all barrels are different. Tighter bores increase pressure, as in .218 vs .219. Your mileage may vary!

Good catch on the twist rate! According to Tikka page the factory T3x lite in 7-08 is 1:9.

 

[jfjohn77]

Sorry for the bore dia. quote... I was thinking about my 22 Creedmoor because that's what I working on right now.

 

[jjohnsonElknewbie]

If you plug in 2.925 COL and 1:9 twist, what does it throw for pressure?

 

[jfjohn77]

With your 46.5 charge this shows you are at around 62000 psi. But, again I don't have all of your particulars. What brand brass are you using? Do you know the water weight of one of you fired cases? That makes a difference in the results. There is something obviously different in the input data because the velocity shows to be lower than what you actually recorded. Something that is important to me is load ratio and burnt propellant %. Ideally I want 100% burn with a load density ratio of 94 to 98%. If that ratio get too low and you have a lot of space in the case, you get an inconsistent burn form shot to shot, so there goes your accuracy. There's a lot of debate as to the effect unburnt powder has on the bullet as it leaves the barrel. If you look at the gas flow velocity vs bullet velocity and you have unburnt powder pushing that bullet, I believe those little particles peppering the base of the bullet can't help with accuracy. Can't prove it, other than observation. Just my way of thinking. You may give some thought to downloading Gordan's Reloading Tool, It's free. Fun to play with, a little learning curve, but there's help available online.

download [Gordons Reloading Tool Community]

www.grtools.de

 

[jjohnsonElknewbie]

With your 46.5 charge this shows you are at around 62000 psi. But, again I don't have all of your particulars. What brand brass are you using? Do you know the water weight of one of you fired cases? That makes a difference in the results. There is something obviously different in the input data because the velocity shows to be lower than what you actually recorded. Something that is important to me is load ratio and burnt propellant %. Ideally I want 100% burn with a load density ratio of 94 to 98%. If that ratio get too low and you have a lot of space in the case, you get an inconsistent burn form shot to shot, so there goes your accuracy. There's a lot of debate as to the effect unburnt powder has on the bullet as it leaves the barrel. If you look at the gas flow velocity vs bullet velocity and you have unburnt powder pushing that bullet, I believe those little particles peppering the base of the bullet can't help with accuracy. Can't prove it, other than observation. Just my way of thinking. You may give some thought to downloading Gordan's Reloading Tool, It's free. Fun to play with, a little learning curve, but there's help available online.

download [Gordons Reloading Tool Community]

www.grtools.de

Thank you, and I apprecaite the numbers. I'm using Alpha OCD as my primary and my secondary is necked down Federal Gold Medal .308. Obviously I don't mix and match when loading. I don't have the water weights of either.

I'm in the process of downloading/installing the GRT and will play around with it later.

Looking at the brass from the 15 I fired yesterday, there are swipes on some, but not all of the cases. However, there was zero bolt stickiness or lift effort when extracting. I've heard mixed reviews on here about what pressure signs guys pay the most attention to, and usually its the latter (bolt behavior) regarding safety of a load. The group at 46.5 speaks for itself, and for safety's sake I may do another test at 46.2 as suggested and see 1) if I still get swipes and 2) if the group opens up.

@Pharmseller in your experience with multiple Tikka T3x lites in 7-08, what are the most common pressure signs? I know you typically run Big Game so not apples to apples, but I'd appreciate your observations.