Optilock height for tikka m595 and delta titanium 56mm

[Sheprador1973]

Hi all. About to pick up a Delta Titanium 2.5-15x56 HD (30mm tube) scope to mount on my Tikka M595 in .308.

Previously had a 1" tube scope on it which was very close to the barrel (2-3mm) with my existing Optilocks and bases. I believe they are extra low (28.5mm from bottom of base to mid point of scope).

Wondering if anyone has fitted the above scope to a similar tikka with standard barrel using optilocks? Figure I need 30mm Lows or Mediums but having studied the charts I can't figure out which I need with any certainty.

Hope you can help thank you. P

 

[Sheprador1973]

Btw I'm keeping the bases and will swap or sell the existing 1" rings

 

[fizzbangwhallop]

If your existing 1” rings are Extra lows with the 3mm height from the top of the base to the bottom of the ring (Lows would be 5mm) then logically the 30mm tube will sit 2.5mm higher than the 1” tube being half the difference between the two tubes.

If the 1” scope wasn’t a 56mm objective then you’ll need to factor in half the difference in the objectives too, be wise to check that if it was front parallax anyway.

I have some ‘spares’

 

[Sheprador1973]

If your existing 1” rings are Extra lows with the 3mm height from the top of the base to the bottom of the ring (Lows would be 5mm) then logically the 30mm tube will sit 2.5mm higher than the 1” tube being half the difference between the two tubes.

If the 1” scope wasn’t a 56mm objective then you’ll need to factor in half the difference in the objectives too, be wise to check that if it was front parallax anyway.

I have some ‘spares’

View attachment 327886

Sorry, my.mistake. The 3mm was referring to the approximate clearance between barrel and scope. I figured keeping the same rings while upping to a 56mm objective would close that gap to nothing. So trying to figure if lows or meds will be best (need it as low as I can get away with). Thank you

 

[Sheprador1973]

I guess what I really need to know is the outside diameter of the Delta's objective lens.

 

[Sheprador1973]

These are what I've got...for 1" tubes. Are these Lows please fizzbangwhallop?

 

[fizzbangwhallop]

I reckon they’re lows at 5mm ignoring the plastic internal ring spacer.

If your 1” tubed scope was a ‘56mm‘ objective and the same outer diameter as the Delta, then the fatter 30mm tube will hold the objective a further 2.5mm odd off the barrel. So, your 3mm + the 2.5mm from the fatter tube.

 

[Sheprador1973]

I think you're right mate...they seem like lows. Trouble is my 1" tube scope was 50mm obj. not 56mm which is doing my tired brain in too much to calculate. Need the OD of the Delta objective to reference against the chart.

 

[long_range_rob]

Probably need mediums tbh

 

[Donkey Basher]

I'd say medium too, having just worked out that was what I needed to fit a Zeiss 56mm on my M595.

All the information you need to work out what rings you need, once you've got the outside diameter of the objective housing, is in the table on the back of the packaging shown in post #3 above

 

[Sheprador1973]

I'd say medium too, having just worked out that was what I needed to fit a Zeiss 56mm on my M595.

All the information you need to work out what rings you need, once you've got the outside diameter of the objective housing, is in the table on the back of the packaging shown in post #3 above

Thanks mate, is my gut feeling too. No one's yet come forward with the aoad though

 

[Donkey Basher]

It’s not difficult to find - assuming it’s the same scope, according to article in Gunmart the OD of the objective is 64mm

 

[nun_hunter]

If you can't calculate it with confidence (length of scope will impact where the objective is in relation to the barrel if it is tapered as it leaves the action) I'd just wait for the scope to arrive and then sit it on the bases and measure how far away it needs to be for the objective to clear the barrel. Bearing in mind where you settle the scope for the right eye relief.

I know we all want the scope mounted asap but sometimes the frustrating/sensible thing to do is to measure it.

 

[Craigsaun]

I used lows with my tikka 50mm objective. I wouldn’t have room for 56mm . So l would say with confidence, you need medium

 

[Greenmist]

As above, I have 30mm lows with a 50mm objective and its perfect, no room for a larger lens though

 

[the prowler]

Hi all. About to pick up a Delta Titanium 2.5-15x56 HD (30mm tube) scope to mount on my Tikka M595 in .308.

Previously had a 1" tube scope on it which was very close to the barrel (2-3mm) with my existing Optilocks and bases. I believe they are extra low (28.5mm from bottom of base to mid point of scope).

Wondering if anyone has fitted the above scope to a similar tikka with standard barrel using optilocks? Figure I need 30mm Lows or Mediums but having studied the charts I can't figure out which I need with any certainty.

Hope you can help thank you. P

Medium rings would be fine with optilock bases

 

[Mick9abf]

For 56mm with a 30mm tube you need medium which will give you about 3 or 4mm clearance from the barrel with the objective bell.

 

[zerovarm]

The 2.5-15x50 Delta (OD 58mm) will go with lows not the 56

 

[Sheprador1973]

Thank you to all the above. Going with mediums and will report back (a definitive answer might help others in future). Appreciate the comments

 

[Greenmist]

I also had a Sightron S111 56mm on mine, for that I switched to leupold bases and rings