Yes
With a few caveats.
First off LR (Leverevolution) May or may not shoot well in your rifle with the bullets at hand.
Some powders just seem to be the pixie dust that allow small groups with a given bullet.
To help you visualize this Go to Nosler.com look at the load data for another caliber that they have data for. As of yet they do not have data for the 6mm ARC. Bear with me here. Nosler offers some neat info that is not offered in total elsewhere. They offer case fill percentage, most accurate charge weight tested & most accurate powder tested. Your results may or mayn't mimic there results.
Notice: with any caliber say 6.5 Creedmoor for example how diffrent powders are listed as more accurate for different weight bullets. Then notice how different charge weights offer top accuracy while one powder works well at upper velocity limit. Then another propellant offers best accuracy nearer the lower limit. Not exactly, always, straightforward.
Sometimes there are combinations that just shoot great in most all rifles. 6mm ARC has had relatively little time to have brought this info to the top yet. been especially difficult with component shortages.
If it were me I would start off with what we call a ladder test. You somewhat express this is your intention.
Would a chronograph help? You bet.
Nessisary? Not exactly.
is there a learning curve to the chronograph? Absolutely.
given the expense of the all copper bullets I would start my learning curve to reloading with a less expensive bullet. say a smilar weight cup & core bullet. Ill choose a 90 gr ELDX. you may go a diffrent direction. Will the data you glean from this cup & core test translate directly to your all copper bullet? Not likely.
Ok we can do our ladder test with your powder & bullet that is very similar in weight.
I would load 1 round at the low end of the spectrum. Write the grain weight on the casing with a fine tip permanent marker. load another 1/2 grain heavier & lable with marker. Work your way up to the max load with the 1/2 grain increases.
goal will be to test for shift in point of impact & or change in velocity.
For testing point of impact your means of resting the rifle will need to be very steady in a repeatable fashion throuought the shot string. I am thinking a front bipod or bags. Rear of the rife will be steadied with a bag as well. With no chronograph involved I would fire one round & hopefully your impact is within a few inches if the point of aim. not sure about your range setup, though in my case I would go when not likely to be at all busy.
So my routine would set target at 100 yards, fire 1st low charge round. Walk down range & lable that point of impact as 1. inspect case for primer forme & proceed to the next higher charge weight round. take your time 7 fire another very steady shot 7 mark this impact as no 2. Proceed in the same manner through all charge weights.
What you are looking for is charge weights that do not change point of impact much ac the charge weight steps up a half grain or down a half grain.
Question for yourself is are you steady enough that your results are not significantly impacted by shooter error?
As you reach the upper limit you may see flattened primers or difficult bolt lift. You may need to stop with increased charge weights if pressure signs are telling you to back off.
While Lever evolution offers the most potential velocity: LVR may or may not offer the accuracy you are hoping for. LVR has its place for sure, May or may not be with your GMX bullets in terms of long range accuracy. Some times it takes trying another propellant to find the magic pixie dust.
Personally, I did not hold out a great deal of hope for LVR under the longer 90 grain GMX or CX bullets as I expect the powder may be, too compressed at the upper charge limits. Additionally LVR is not very temp stable. Lesser temp stability has the potential to translate to a load shooting well at 40 degrees, though not shooting well at 90 degrees & over pressure at 90 degrees.
Or, a load that shoots well at 90 degrees F may may or may not shoot well at 30 or 40 F are question marks I prefer to not need to worry about.
With a few caveats.
First off LR (Leverevolution) May or may not shoot well in your rifle with the bullets at hand.
Some powders just seem to be the pixie dust that allow small groups with a given bullet.
To help you visualize this Go to Nosler.com look at the load data for another caliber that they have data for. As of yet they do not have data for the 6mm ARC. Bear with me here. Nosler offers some neat info that is not offered in total elsewhere. They offer case fill percentage, most accurate charge weight tested & most accurate powder tested. Your results may or mayn't mimic there results.
Notice: with any caliber say 6.5 Creedmoor for example how diffrent powders are listed as more accurate for different weight bullets. Then notice how different charge weights offer top accuracy while one powder works well at upper velocity limit. Then another propellant offers best accuracy nearer the lower limit. Not exactly, always, straightforward.
Sometimes there are combinations that just shoot great in most all rifles. 6mm ARC has had relatively little time to have brought this info to the top yet. been especially difficult with component shortages.
If it were me I would start off with what we call a ladder test. You somewhat express this is your intention.
Would a chronograph help? You bet.
Nessisary? Not exactly.
is there a learning curve to the chronograph? Absolutely.
given the expense of the all copper bullets I would start my learning curve to reloading with a less expensive bullet. say a smilar weight cup & core bullet. Ill choose a 90 gr ELDX. you may go a diffrent direction. Will the data you glean from this cup & core test translate directly to your all copper bullet? Not likely.
Ok we can do our ladder test with your powder & bullet that is very similar in weight.
I would load 1 round at the low end of the spectrum. Write the grain weight on the casing with a fine tip permanent marker. load another 1/2 grain heavier & lable with marker. Work your way up to the max load with the 1/2 grain increases.
goal will be to test for shift in point of impact & or change in velocity.
For testing point of impact your means of resting the rifle will need to be very steady in a repeatable fashion throuought the shot string. I am thinking a front bipod or bags. Rear of the rife will be steadied with a bag as well. With no chronograph involved I would fire one round & hopefully your impact is within a few inches if the point of aim. not sure about your range setup, though in my case I would go when not likely to be at all busy.
So my routine would set target at 100 yards, fire 1st low charge round. Walk down range & lable that point of impact as 1. inspect case for primer forme & proceed to the next higher charge weight round. take your time 7 fire another very steady shot 7 mark this impact as no 2. Proceed in the same manner through all charge weights.
What you are looking for is charge weights that do not change point of impact much ac the charge weight steps up a half grain or down a half grain.
Question for yourself is are you steady enough that your results are not significantly impacted by shooter error?
As you reach the upper limit you may see flattened primers or difficult bolt lift. You may need to stop with increased charge weights if pressure signs are telling you to back off.
While Lever evolution offers the most potential velocity: LVR may or may not offer the accuracy you are hoping for. LVR has its place for sure, May or may not be with your GMX bullets in terms of long range accuracy. Some times it takes trying another propellant to find the magic pixie dust.
Personally, I did not hold out a great deal of hope for LVR under the longer 90 grain GMX or CX bullets as I expect the powder may be, too compressed at the upper charge limits. Additionally LVR is not very temp stable. Lesser temp stability has the potential to translate to a load shooting well at 40 degrees, though not shooting well at 90 degrees & over pressure at 90 degrees.
Or, a load that shoots well at 90 degrees F may may or may not shoot well at 30 or 40 F are question marks I prefer to not need to worry about.