7mm-08 or 6,5CM

rascal1

rascal1

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Looking for feed back from any of you guys who have hunted with either of both of these chamberings. I am prepping for an upcoming Elk hunt where I expect to be doing lots of humping through the bush. Last year I carried my 9 lb A bolt 300 Win Mag. This year looking to change it up with a lighter rifle.

Looking at using a Tikka T3x in 6.5 CM or same rifle in 7mm08. Haven't hunted with either of those chamberings. Looks like I can get the rifle in at 7 lbs all up. I have a 6.5 CM now but wondering if a 7mm08 would be a better choice for shots inside 400yrs or so. What say you guys with experience? Not sure if you guys consider 7lbs light for a hiking/mountain rifle but at 2 lbs lighter than my A bolt and much shorter, it should be way more manageable. Yes there are lighter rifles out there I know...
 
The 6.5 is fine, a 7:08 can't do anything more than the 6.5 can. The 6.5's tend to have better BC's for long distance stuff but see you mention inside 400 yds. No need to change it up unless you are looking for a reason to buy another rifle. If that is the case then go for it! Or, put that money into a top notch scope for the 6.5
 
Grey_Wolf said:
The 6.5 is fine, a 7:08 can't do anything more than the 6.5 can. The 6.5's tend to have better BC's for long distance stuff but see you mention inside 400 yds. No need to change it up unless you are looking for a reason to buy another rifle. If that is the case then go for it! Or, put that money into a top notch scope for the 6.5
Click to expand...

Thanks, like you say, they perform very similarly. The 7mm08 hold about 200ft/lb advantagebout to 500 yrs and shoots about as flat so thought but might be a good alternative. Have my eye on a good light scope for sure.
 
I too was considering between these two cartridges. The ballistic are almost identical within 500 yards. I think bullet selection is more important than the cartridge.
 
Grey_Wolf said:
The 6.5 is fine, a 7:08 can't do anything more than the 6.5 can. The 6.5's tend to have better BC's for long distance stuff but see you mention inside 400 yds. No need to change it up unless you are looking for a reason to buy another rifle. If that is the case then go for it! Or, put that money into a top notch scope for the 6.5
Click to expand...

Yup, run what you got and better glass....
Thanks for the chortle this morning WL, very funny here at 04:30 (crack-oh-dawn).
Rob
 
Both are great choices. Close your eyes and pick one, or carry one with the 6.5CM since you own one already. One of those times you just can't go wrong.
 
Whatever one shoots a premium bullet to MOA , if they both do, they they both work.

Which shoots betters for you?

Slightly more bullet choices in .284 , that could be a factor for you.
 
6.5 Creedmoor for elk should get the Luddites going

giphy.gif
 
Not much difference between the two.
They are both kissing cousins in performance to cartridges introduced about 125 years ago.
For Elk, I would be choosing a premium bullet at the heavier end of the spectrum for either of them.
 
For elk specifically, I would go with the 7-08 and shoot a stout heavier bullet, the 7mm bores can take the heavier bullets better than 6.5mm bores... that is not to say that you would be greatly handicapped with the 6.5. For deer, it would be splitting hairs even further and wouldn't really matter which way you go... or even which bullet you choose, if you place it in the boiler room.
 
saskbooknut said:
Not much difference between the two.
They are both kissing cousins in performance to cartridges introduced about 125 years ago.
For Elk, I would be choosing a premium bullet at the heavier end of the spectrum for either of them.
Click to expand...

Over 200 fps muzzle velocity with a 140 gr bullet is getting real close to being different.
 
rascal1 said:
Looking for feed back from any of you guys who have hunted with either of both of these chamberings. I am prepping for an upcoming Elk hunt where I expect to be doing lots of humping through the bush. Last year I carried my 9 lb A bolt 300 Win Mag. This year looking to change it up with a lighter rifle.

Looking at using a Tikka T3x in 6.5 CM or same rifle in 7mm08. Haven't hunted with either of those chamberings. Looks like I can get the rifle in at 7 lbs all up. I have a 6.5 CM now but wondering if a 7mm08 would be a better choice for shots inside 400yrs or so. What say you guys with experience? Not sure if you guys consider 7lbs light for a hiking/mountain rifle but at 2 lbs lighter than my A bolt and much shorter, it should be way more manageable. Yes there are lighter rifles out there I know...
Click to expand...

If I had a 6;5 CM I liked I wouldn't be trading it for a 7-08 in the same package, and vice versa. Both are going to do a similar job when the same bullet is used.
 
Buckmastr said:
Over 200 fps muzzle velocity with a 140 gr bullet is getting real close to being different.
Click to expand...

comparison with 140gr Nosler Partitions loaded to 62,000 psi

Code: 
Cartridge          : [COLOR=#ff0000][B]6.5 Creedmoor[/B][/COLOR]
Bullet             : .264, 140, Nosler PART SP 16321
Useable Case Capaci: 46.318 grain H2O = 3.007 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 62000 psi, or 427 MPa
or a maximum loading ratio or filling of 104 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

117 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-17                  92.4     41.4     2.68    2773   100.0    62000   10431   1.109  ! Near Maximum !
Alliant Reloder-16                  98.6     41.0     2.66    2742   100.0    62000   10287   1.122  ! Near Maximum !
Ramshot Hunter                      97.0     42.8     2.77    2734    99.5    62000   10727   1.120  ! Near Maximum !
Hodgdon H414                        91.6     41.4     2.68    2726    99.1    62000   10717   1.124  ! Near Maximum !
Winchester 760                      91.6     41.4     2.68    2726    99.1    62000   10717   1.124  ! Near Maximum !
IMR 4831                           101.1     41.3     2.68    2697   100.0    62000   10051   1.136  ! Near Maximum !
Ramshot Big Game                    87.3     39.7     2.57    2692   100.0    62000    9772   1.130  ! Near Maximum !
Hodgdon Hybrid 100V                 99.0     40.9     2.65    2682   100.0    62000    9446   1.129  ! Near Maximum !
Alliant Reloder-15                  87.9     37.5     2.43    2679   100.0    62000    9764   1.139  ! Near Maximum !
Hodgdon H4350                       99.0     41.4     2.68    2673    98.6    62000   10146   1.128  ! Near Maximum !

Code: 
Cartridge          : [COLOR=#ff0000][B]7 mm-08 Rem.[/B][/COLOR]
Bullet             : .284, 140, Nosler PART SP 16325
Useable Case Capaci: 48.679 grain H2O = 3.161 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 62000 psi, or 427 MPa
or a maximum loading ratio or filling of 104 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

93 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-17                  99.8     47.0     3.04    2919   100.0    62000   10073   1.027  ! Near Maximum !
Winchester 760                      98.6     46.8     3.03    2850    96.9    62000   10035   1.044  ! Near Maximum !
Hodgdon H414                        98.6     46.8     3.03    2850    96.9    62000   10035   1.044  ! Near Maximum !
Hodgdon CFE223                      88.6     44.3     2.87    2830    99.9    62000    9367   1.051  ! Near Maximum !
Ramshot Big Game                    93.9     44.9     2.91    2828    99.7    62000    9384   1.050  ! Near Maximum !
IMR 4895                            93.5     42.0     2.72    2822    99.8    62000    9406   1.059  ! Near Maximum !
Alliant Reloder-15                  94.3     42.3     2.74    2811    99.5    62000    9358   1.060  ! Near Maximum !
Hodgdon BL-C2                       89.0     43.6     2.83    2809   100.0    62000    9168   1.062  ! Near Maximum !
Winchester 748                      86.7     41.8     2.71    2807   100.0    62000    8836   1.057  ! Near Maximum !
IMR 4320                            96.4     42.5     2.76    2800    99.7    62000    9023   1.049  ! Near Maximum !
Hodgdon H4895                       91.1     40.9     2.65    2798    99.9    62000    9098   1.063  ! Near Maximum !
Hodgdon H380                        95.6     43.8     2.84    2795    98.7    62000    9406   1.063  ! Near Maximum !
IMR 3031                            93.6     39.3     2.54    2793   100.0    62000    8337   1.062  ! Near Maximum !
IMR 4350                           103.9     46.4     3.00    2783    96.2    62000    9390   1.053  ! Near Maximum !
Hodgdon VARGET                      97.1     42.2     2.73    2777    99.4    62000    9011   1.058  ! Near Maximum !
Ramshot TAC                         89.8     43.5     2.82    2772    98.3    62000    9192   1.063  ! Near Maximum !
IMR 4064                            97.8     41.4     2.69    2769    99.6    62000    8855   1.061  ! Near Maximum !
IMR 4451 Enduron                    99.3     44.0     2.85    2768    96.7    62000    9261   1.057  ! Near Maximum !
IMR 8208 XBR                        90.0     40.4     2.62    2767   100.0    62000    8637   1.065  ! Near Maximum !
IMR 4166 Enduron                    98.9     42.5     2.75    2748    96.9    62000    9023   1.064  ! Near Maximum !
Hodgdon H4350                      104.0     45.7     2.96    2736    95.4    58907    9245   1.074  ! Near Maximum !

Using the average speeds from the above loads :

6.5 Creedmoor 2712 fps
7mm-08 2801 fps


6.5 Creedmoor, 140gr Nosler Partition (BC .490)
2712 fps muzzle velocity
100y +1.8", 2544 fps, 2012 ft lbs energy
200y 0.0", 2382 fps, 1764 ft lbs
300y -7.9", 2226 fps, 1540 ft lbs
400y -22.9", 2076 fps, 1340 ft lbs
500y -46", 1932 fps, 1160 ft lbs

7mm-08, 140gr Nosler Partition (BC .434)
2801 fps muzzle velocity
100y +1.7", 2608 fps, 2114 ft lbs energy
200y 0.0", 2423 fps, 1825 ft lbs
300y -7.6", 2246 fps, 1568 ft lbs
400y -22.1", 2076 fps, 1340 ft lbs
500y -44.7", 1914 fps, 1138 ft lbs
 
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